Quarterly report pursuant to Section 13 or 15(d)

Investments at Fair Value - Additional Information (Detail)

v3.3.0.814
Investments at Fair Value - Additional Information (Detail) - USD ($)
 9 Months Ended
Sep. 30, 2015
Oct. 31, 2015
Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Equity Method Investments $ 250,000   $ 200,000
Trading Securities $ 39,951,000   20,002,000
Fair Value Assumptions, Weighted Average Volatility Rate 25.40%    
Share Price $ 9.49    
Investments in and Advances to Affiliates, at Fair Value, Period Increase (Decrease) $ 1,400,000    
Investment Owned, at Fair Value 3,800,000    
Working Capital 500,000    
Working Capital Committed 100,000    
Additional Paid In Capital $ 231,684,000 $ 50,000 212,205,000
Business Acquisition, Percentage of Voting Interests Acquired 31.69%    
Redeemable warrants [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Business Acquisition, Share Price $ 0.27    
Non Redeemable warrants [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Business Acquisition, Share Price 0.30    
Ghaidarov Model [Member] | Warrant [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Business Acquisition, Share Price $ 0.84    
Binomial Lattice Model [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value Assumptions, Risk Free Interest Rate 1.37%    
Fair Value Assumptions, Expected Volatility Rate 25.40%    
Fair Value Assumptions, Exercise Price $ 11.50    
Binomial Lattice Model [Member] | Warrant [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Business Acquisition, Share Price $ 0.95    
US Treasury Securities [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Trading Securities $ 40,000,000   $ 20,000,000
Common Stock Subject to Mandatory Redemption [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Net Assets $ 42,600,000    
Private Units [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Business Acquisition, Share Price $ 3.00    
Insider Shares [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Share Price 8.99    
Business Acquisition, Share Price $ 2.84