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INVESTMENTS (Details) (USD $)
 3 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Mar. 31, 2012
INVESTMENTS [Abstract]      
Portfolio investments categorized as Level 3 (in hundredths) 68.70%   56.90%
Fair Value Inputs, Assets, Quantitative Information [Line Items]      
Fair Value $ 333,500,000    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total Investments 485,700,000   558,500,000
Summary of changes in fair value of investments [Roll Forward]      
Fair value beginning of period 317,800,000    
Net Unrealized Appreciation (Depreciation) 9,500,000    
Net Changes from Unrealized to Realized 0    
New / Add-On Investments 6,200,000    
Divestitures 0    
Fair value end of period 333,500,000    
Unrealized gains (losses) included in earnings that related to asset still held at report date 4,389,243 4,558,159  
Recurring [Member] | Level 1 [Member]
      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total Investments 152,200,000   240,700,000
Recurring [Member] | Level 2 [Member]
      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total Investments 0   0
Recurring [Member] | Level 3 [Member]
      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total Investments 333,500,000   317,800,000
Debt [Member]
      
Fair Value Inputs, Assets, Quantitative Information [Line Items]      
Fair Value 14,800,000    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total Investments 14,800,000   11,200,000
Summary of changes in fair value of investments [Roll Forward]      
Fair value beginning of period 11,200,000    
Net Unrealized Appreciation (Depreciation) 600,000    
Net Changes from Unrealized to Realized 0    
New / Add-On Investments 3,000,000    
Divestitures 0    
Fair value end of period 14,800,000    
Debt [Member] | Recurring [Member] | Level 1 [Member]
      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total Investments 0   0
Debt [Member] | Recurring [Member] | Level 2 [Member]
      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total Investments 0   0
Debt [Member] | Recurring [Member] | Level 3 [Member]
      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total Investments 14,800,000   11,200,000
Debt [Member] | Discounted Cash Flow [Member]
      
Fair Value Inputs, Assets, Quantitative Information [Line Items]      
Fair Value 8,900,000    
Weighted Average Discount Rate 16.14%    
Debt [Member] | Face Value [Member]
      
Fair Value Inputs, Assets, Quantitative Information [Line Items]      
Fair Value 5,900,000    
Debt [Member] | Maximum [Member] | Discounted Cash Flow [Member]
      
Fair Value Inputs, Assets, Quantitative Information [Line Items]      
Discount Rate 17.42%    
Debt [Member] | Minimum [Member] | Discounted Cash Flow [Member]
      
Fair Value Inputs, Assets, Quantitative Information [Line Items]      
Discount Rate 11.75%    
Preferred & Common Equity [Member]
      
Fair Value Inputs, Assets, Quantitative Information [Line Items]      
Fair Value 307,100,000    
Preferred & Common Equity [Member] | Market Approach [Member]
      
Fair Value Inputs, Assets, Quantitative Information [Line Items]      
Fair Value 278,000,000    
Weighted Average Multiple 5.76    
Preferred & Common Equity [Member] | Market Approach [Member]
      
Fair Value Inputs, Assets, Quantitative Information [Line Items]      
Fair Value 8,200,000    
Weighted Average Multiple 1.42    
Preferred & Common Equity [Member] | Net Book Value [Member]
      
Fair Value Inputs, Assets, Quantitative Information [Line Items]      
Fair Value 5,700,000    
Preferred & Common Equity [Member] | Discounted Cash Flow [Member]
      
Fair Value Inputs, Assets, Quantitative Information [Line Items]      
Fair Value 4,400,000    
Weighted Average Discount Rate 15.35%    
Preferred & Common Equity [Member] | Market Approach [Member]
      
Fair Value Inputs, Assets, Quantitative Information [Line Items]      
Fair Value 2,300,000    
Weighted Average Multiple 1.00    
Preferred & Common Equity [Member] | Market Approach [Member]
      
Fair Value Inputs, Assets, Quantitative Information [Line Items]      
Fair Value 8,300,000    
Preferred & Common Equity [Member] | Market Approach [Member]
      
Fair Value Inputs, Assets, Quantitative Information [Line Items]      
Fair Value 200,000    
Preferred & Common Equity [Member] | Maximum [Member] | Market Approach [Member]
      
Fair Value Inputs, Assets, Quantitative Information [Line Items]      
Multiple 6.50    
Preferred & Common Equity [Member] | Maximum [Member] | Market Approach [Member]
      
Fair Value Inputs, Assets, Quantitative Information [Line Items]      
Multiple 3.00    
Preferred & Common Equity [Member] | Maximum [Member] | Discounted Cash Flow [Member]
      
Fair Value Inputs, Assets, Quantitative Information [Line Items]      
Discount Rate 18.00%    
Preferred & Common Equity [Member] | Minimum [Member] | Market Approach [Member]
      
Fair Value Inputs, Assets, Quantitative Information [Line Items]      
Multiple 3.25    
Preferred & Common Equity [Member] | Minimum [Member] | Market Approach [Member]
      
Fair Value Inputs, Assets, Quantitative Information [Line Items]      
Multiple 1.10    
Preferred & Common Equity [Member] | Minimum [Member] | Discounted Cash Flow [Member]
      
Fair Value Inputs, Assets, Quantitative Information [Line Items]      
Discount Rate 3.32%    
Preferred & Common Equity [Member] | Minimum [Member] | Market Approach [Member]
      
Fair Value Inputs, Assets, Quantitative Information [Line Items]      
Multiple 1.00    
Partnership Interest [Member]
      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total Investments 11,600,000   11,000,000
Summary of changes in fair value of investments [Roll Forward]      
Fair value beginning of period 11,000,000    
Net Unrealized Appreciation (Depreciation) 600,000    
Net Changes from Unrealized to Realized 0    
New / Add-On Investments 0    
Divestitures 0    
Fair value end of period 11,600,000    
Partnership Interest [Member] | Recurring [Member] | Level 1 [Member]
      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total Investments 0   0
Partnership Interest [Member] | Recurring [Member] | Level 2 [Member]
      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total Investments 0   0
Partnership Interest [Member] | Recurring [Member] | Level 3 [Member]
      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total Investments 11,600,000   11,000,000
Partnership Interest [Member] | Net Asset Value [Member]
      
Fair Value Inputs, Assets, Quantitative Information [Line Items]      
Fair Value 11,600,000 [1]    
Preferred Equity [Member]
      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total Investments 39,300,000   33,900,000
Summary of changes in fair value of investments [Roll Forward]      
Fair value beginning of period 33,900,000    
Net Unrealized Appreciation (Depreciation) 2,200,000    
Net Changes from Unrealized to Realized 0    
New / Add-On Investments 3,200,000    
Divestitures 0    
Fair value end of period 39,300,000    
Preferred Equity [Member] | Recurring [Member] | Level 1 [Member]
      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total Investments 0   0
Preferred Equity [Member] | Recurring [Member] | Level 2 [Member]
      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total Investments 0   0
Preferred Equity [Member] | Recurring [Member] | Level 3 [Member]
      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total Investments 39,300,000   33,900,000
Common Equity [Member]
      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total Investments 420,000,000   502,400,000
Summary of changes in fair value of investments [Roll Forward]      
Fair value beginning of period 261,700,000    
Net Unrealized Appreciation (Depreciation) 6,100,000    
Net Changes from Unrealized to Realized 0    
New / Add-On Investments 0    
Divestitures 0    
Fair value end of period 267,800,000    
Common Equity [Member] | Recurring [Member] | Level 1 [Member]
      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total Investments 152,200,000   240,700,000
Common Equity [Member] | Recurring [Member] | Level 2 [Member]
      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total Investments 0   0
Common Equity [Member] | Recurring [Member] | Level 3 [Member]
      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total Investments 267,800,000   261,700,000
Warrant [Member] | Pricing Model [Member]
      
Fair Value Inputs, Assets, Quantitative Information [Line Items]      
Fair Value $ 0    
Stock Price $ 0.00    
Warrant [Member] | Maximum [Member] | Pricing Model [Member]
      
Fair Value Inputs, Assets, Quantitative Information [Line Items]      
Stock Price $ 0.00    
[1] All funds are valued in accordance to ASC 820.