CoverAbstract Document Information [Table] Document Information [Line Items] Amendment Description Amendment Flag Amendment Flag Auditor Firm ID Auditor Location Auditor Name City Area Code City Area Code Current Fiscal Year End Date Current Fiscal Year End Date dei_DocumentAnnualReport Document Fiscal Period Focus Document Fiscal Period Focus Document Fiscal Year Focus Document Fiscal Year Focus Document Period End Date Document Period End Date Documents Incorporated by Reference [Text Block] Document Transition Report Document Transition Report Document Type Document Type EntityAddressAddressLine1 Entity Address, Address Line Two Entity Address, Address Line Two Entity Address City Or Town Entity Address City Or Town Entity Address Postal Zip Code Entity Address Postal Zip Code Entity Address State Or Province Entity Address State Or Province Entity Central Index Key Entity Central Index Key Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity Current Reporting Status Entity Current Reporting Status Entity Emerging Growth Company Entity Emerging Growth Company Entity File Number Entity File Number Entity Filer Category Entity Filer Category Entity Incorporation State Country Code Entity Incorporation State Country Code Entity Interactive Data Current Entity Interactive Data Current dei_EntityPublicFloat Entity Registrant Name Entity Registrant Name Entity Shell Company Entity Shell Company Entity Small Business Entity Small Business Entity Tax Identification Number Entity Tax Identification Number dei_EntityVoluntaryFilers dei_EntityWellKnownSeasonedIssuer dei_IcfrAuditorAttestationFlag Local Phone Number Local Phone Number Security12b Title Security12b Title Security Exchange Name Security Exchange Name Trading Symbol Trading Symbol Equity Components [Axis] Equity Components Equity Component [Domain] Equity Component Five Point Seven Five Convertible Notes due 2022 [Member] 5.75% Convertible Notes due 2022 [Member] Five point seven five Convertible Notes due 2022. Six Point Zero Zero Notes Due 2022 [Member] 6.00% Notes due 2022 [Member] Six point zero zero notes due 2022. Statement of Financial Position [Abstract] Statement [Table] Statement [Table] Credit Facility [Axis] Credit Facility Credit Facility [Domain] Credit Facility Key Bank Credit Facility [Member] KeyBank Credit Facility Key Bank Credit Facility. Debt Instrument [Axis] Debt Instrument Debt Instrument, Name [Domain] Debt Instrument, Name Two Thousand and Twenty Six Notes [Member] 2026 Notes Two thousand and twenty six notes. Two Thousand And Twenty Two Convertible Notes [Member] 2022 Convertible Notes 2022 Convertible Notes. Two Thousand And Twenty Two Notes [Member] 2022 Notes Two thousand and twenty two notes. Investment, Issuer Affiliation [Axis] Investment, Issuer Affiliation [Domain] Investment, Affiliated Issuer, Controlled [Member] Control Investments Investment, Affiliated Issuer [Member] Affiliate Investments Investment, Unaffiliated Issuer [Member] Non-control/non-affiliate Investments Statement [Line Items] Statement [Line Items] Assets [Abstract] ASSETS Assets Total assets Investments, Fair Value Disclosure [Abstract] Investments at fair value: Accounts Receivable Unsettled Trade Current And Non current Receivable for unsettled trades Accounts receivable unsettled trade current and non current. Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents Dividend and Interest Receivable Interest and dividend receivable Investment Owned, Fair Value Total investments at fair value Fair value Fair value, beginning balance Fair value, ending balance Prepaid Expense Prepaid expenses Commitments and Contingencies Commitments and contingencies (Note 2) Liabilities [Abstract] LIABILITIES Accounts Payable and Accrued Liabilities Accounts payable and accrued expenses Accounts Payable, Trade, Current Trade settlement payable Convertible Notes Payable Convertible Notes (net of deferred financing costs and original issue discount of $999 and $1,117, respectively) Interest Payable Interest and financing fees payable Liabilities Total liabilities Long-Term Line of Credit KeyBank Credit Facility (net of deferred financing costs of $353 and $546, respectively) Credit facility (net of deferred financing costs of $621) Borrowings under Key bank credit facility Management And Incentive Fees Payable Management and incentive fees payable Management and incentive fees payable. Notes Payable Notes (net of deferred financing costs and original issue discount of $1,057 and $1,421, respectively) SBA Guaranteed Debentures SBA-guaranteed debentures (net of deferred financing costs of zero and $485, respectively) SBA Guaranteed debentures. Liabilities and Equity Total liabilities and net assets Net Asset Value Per Share Net asset value per share Par Value Par Value Net asset value per share at end of period Equity, Attributable to Parent [Abstract] NET ASSETS Additional Paid in Capital Additional paid in capital Common Stock, Value, Issued Common stock, par value $0.01, 100,000,000 common shares authorized, 2,711,068 and 2,711,068 common shares issued and outstanding, respectively Retained Earnings (Accumulated Deficit) Total distributable loss Equity, Attributable to Parent Total net assets Beginning Balance Ending Balance Net assets at end of period Long-Term Debt, Type [Axis] Long-Term Debt, Type Long-Term Debt, Type [Domain] Long-Term Debt, Type Line of Credit [Member] KeyBank Credit Facility Common Stock, Par or Stated Value Per Share Common Stock, Par value Common stock, par value Common Stock, Shares Authorized Common Stock, Shares Authorized Common Stock, Shares, Issued Common Stock, Shares, Issued Common Stock, Shares, Outstanding Common Stock, Shares, Outstanding Beginning Balance, shares Ending Balance, shares Shares outstanding at end of period Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net Net of deferred financing costs and original issue discount Investment Owned, Cost Amortized cost Cost Line of Credit Facility Excess Shortage Net of deferred financing costs Line of credit facility excess shortage. Income Statement [Abstract] Costs and Expenses [Abstract] EXPENSES Administrative Fees Expense Administrative service fees Expenses Before Incentive Fee Waiver Expenses before incentive fee waiver Expenses before incentive fee waiver. General and Administrative Expense General and administrative expenses Incentive Fee Expense Incentive fees Incentive fee Interest and Debt Expense Interest and financing expenses Total interest and financing expenses Investment Company Incentive Fee Waiver Incentive fee waiver (See Note 6) Incentive fee waiver Investment company incentive fee waiver. Investment Income, Investment Expense Total expenses Management Fee Expense Base management fee Net Investment Income NET INVESTMENT (LOSS) INCOME Net investment (loss) income Noninterest Expense Directors Fees Directors expense Directors' expense Net (decrease) increase in net assets resulting from operations per share - basic NET DECREASE IN NET ASSETS PER SHARE RESULTING FROM OPERATIONS – BASIC Net decrease in net assets per share from operations - basic NET DECREASE IN NET ASSETS PER SHARE RESULTING FROM OPERATIONS - DILUTED NET DECREASE IN NET ASSETS PER SHARE RESULTING FROM OPERATIONS – DILUTED Net (decrease) increase in net assets resulting from operations per share - diluted Investment Company, Distribution to Shareholders, Per Share DISTRIBUTIONS PAID PER SHARE Investment Income, Net [Abstract] INVESTMENT INCOME Dividend Income [Abstract] Dividend income: Dividend income abstract. Dividend Income, Operating Total dividend income Gross Investment Income, Operating Total investment income Interest and Dividend Income, Operating [Abstract] Interest income: Investment Income, Interest Accrued and (Non-accrued) Total interest and fee income Investment income, interest accrued and (non-accrued). Interest Income, Operating, Paid in Cash Interest income from cash and cash equivalents Other Investment Income [Abstract] Other income: Other investment income abstract. Other Income Total other income Payment In Kind Interest And Dividend Income [Abstract] Payment-in-kind interest and dividend income: Payment-in-kind interest and dividend income abstract. Interest and Dividend Income, Operating, Paid in Kind Total payment-in-kind interest and dividend income Payment-in-kind interest and dividends Gain (Loss), Investment and Derivative, Operating, before Tax [Abstract] REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS Federal Income Tax Expense (Benefit), Continuing Operations Total federal tax provision (benefit), net (Note 9) Federal Gain (Loss) on Investments Total net realized and unrealized gain (loss) on investments Net Income (Loss) NET (DECREASE) INCREASE IN NET ASSETS RESULTING FROM OPERATIONS Net decrease in net assets resulting from operations - basic and diluted Net (decrease) increase in net assets resulting from operations Realized Gain (Loss), Investment and Derivative, Operating, before Tax [Abstract] Net realized loss on investments: Realized losses on sale of investment Net realized loss on investments Net realized loss on investments Realized Gain (Loss) On Extinguishment Of Debt Net realized (loss) gain on extinguishment of debt Realized gain (loss) on extinguishment of debt. Total Net Realized And Unrealized Gain (Loss) on Investments Net of Tax Total net realized and unrealized gain (loss) on investments, net of taxes Total net realized and unrealized gain (loss) on investments net of tax. Unrealized Gain (Loss), Investment and Derivative, Operating, before Tax [Abstract] Net change in unrealized (depreciation) appreciation on investments: Net change in unrealized appreciation (depreciation) on investments Net change in unrealized appreciation (depreciation) on investments Net change in unrealized (appreciation) depreciation on investments Weighted Average Number of Shares Outstanding, Diluted WEIGHTED AVERAGE COMMON STOCK OUTSTANDING - DILUTED Weighted Average Number of Shares Outstanding, Basic WEIGHTED AVERAGE COMMON STOCK OUTSTANDING – BASIC Weighted average common stock outstanding - basic Investment Company [Abstract] AOCI Attributable to Parent [Member] Total Distributable Loss Additional Paid-in Capital [Member] Additional Paid in Capital Common Stock [Member] Common Stock Gain (Loss) on Extinguishment of Debt Net realized (loss) gain on extinguishment of debt Net realized loss (gain) on extinguishment of debt Extinguishment loss Investment Company, Dividend Distribution Distributions declared Investment company, dividend distribution Investment Return of Capital Return of capital Investment return of capital. Investment Tax Provision Tax provision Investment tax provision. Realized Investment Gains Losses On Investments Net realized loss on investments Realized investment gains losses on investments. Total Distributions Declared and Distributed, DRIP Shares Issued Stock issued under dividend reinvestment plan, shares Stock Issued During Period, Shares, Reverse Stock Splits Fractional shares settled in cash as part of one-for-six reverse stock split Stock Issued During Period, Value, Dividend Reinvestment Plan Stock issued under dividend reinvestment plan Total Distributions Declared and Distributed, DRIP Share Value Tax Reclassification of Stockholders Equity Increase Decrease Tax reclassification of stockholders' equity Tax reclassification of stockholders equity increase decrease. Statement of Cash Flows [Abstract] SBA Guaranteed Debentures [Member] SBA-guaranteed debentures SBA-Guaranteed Debentures SBA guaranteed debentures. Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents CASH AND CASH EQUIVALENTS, beginning of period CASH AND CASH EQUIVALENTS, end of period Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect NET DECREASE IN CASH AND CASH EQUIVALENTS Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING TRANSACTIONS Distributions Paid Through Dividend Reinvestment Plan Share Issuances Distributions paid through dividend reinvestment plan share issuances Distributions paid through dividend reinvestment plan share issuances. Net Cash Provided by (Used in) Financing Activities [Abstract] CASH FLOWS FROM FINANCING ACTIVITIES Net Cash Provided by (Used in) Financing Activities NET CASH USED IN FINANCING ACTIVITIES Payment for Debt Extinguishment or Debt Prepayment Cost Prepayment penalty Payments of Debt Issuance Costs Deferred financing fees paid Payments of Ordinary Dividends, Common Stock Distributions paid to shareholders Proceeds from ING Credit Facility Proceeds from ING Credit Facility Proceeds from ING credit facility. Proceeds from Issuance of Medium-term Notes Proceeds from issuance of 2026 Notes Proceeds from Lines of Credit Proceeds from KeyBank Credit Facility Repayments of Convertible Debt Paydowns on 2022 Notes Repayments of Debt Paydowns on SBA-guaranteed debentures Repayments of Lines of Credit Paydown on KeyBank Credit Facility Repayments on ING Credit Facility Repayments on ING Credit Facility Repayments on ING credit facility. Net Cash Provided by (Used in) Operating Activities [Abstract] CASH FLOWS FROM OPERATING ACTIVITIES Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net decrease in net assets resulting from operations to net cash provided by operating activities: Accretion (Amortization) of Discounts and Premiums, Investments Accretion of original issue discount on investments Amortization of Deferred Charges Amortization of deferred financing fees and original issue discount Investment Tax Provision Benefit Tax provision (benefit) Investment tax provision benefit. Payments for Purchase of Securities, Operating Activities Purchase of investments Proceeds from Sale of Securities, Operating Activities Repayments and sales of investments Increase (Decrease) in Operating Capital [Abstract] Changes in assets and liabilities: Increase (Decrease) in Accounts Payable and Accrued Liabilities Accounts payable and accrued expenses Increase (Decrease) in Accounts Payable, Trade Payable for unsettled trades Increase (Decrease) in Accounts Receivable Receivable for unsettled trades Increase (Decrease) in Interest and Dividends Receivable Interest and dividend receivable Increase (Decrease) in Interest Payable, Net Interest and financing fees payable Increase (Decrease) in Management and Incentive Fees Payable Management and incentive fees payable Increase (Decrease) in Other Operating Assets Other assets Increase (Decrease) in Prepaid Expense Prepaid expenses Net Cash Provided by (Used in) Operating Activities NET CASH PROVIDED BY OPERATING ACTIVITIES Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net decrease in net assets resulting from operations Supplemental Cash Flow Information [Abstract] SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION Interest Paid, Excluding Capitalized Interest, Operating Activities Cash paid for interest Schedule of Investments [Abstract] Schedule of Investments [Table] Schedule Of Investments [Table] Investment, Identifier [Axis] Schedule of Investments [Line Items] Schedule Of Investments [Line Items] Industry Name Industry Industry name. Investment, Basis Spread, Variable Rate Reference rate and spread Interest Rate Interest rate Investment, Interest Rate, Floor Floor