Fair Value Measurements - Summary of Quantitative Information of Fair Value Measurements of Investments (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair Value	53,447,442		6,547,061
Senior Secured Trade Finance Participations [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair Value	47,697,442	[1]	594,225	[2]
Senior Secured Term Loan Participations [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair Value	5,750,000	[1]	3,000,000	[2]
Secured Mezzanine Term Loan [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair Value			2,952,836	[2]
Level 3 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair Value	53,447,442		6,547,061
Level 3 [Member] | Senior Secured Trade Finance Participations [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair Value	47,697,442		594,225
Level 3 [Member] | Senior Secured Trade Finance Participations [Member] | Income Approach [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair Value	47,697,442		594,225
Valuation technique	Income approach
Unobservable input	Market yield
Range (weighted average)	12.66%
Level 3 [Member] | Senior Secured Trade Finance Participations [Member] | Income Approach [Member] | Minimum [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Range (weighted average)	9.00%		9.85%
Level 3 [Member] | Senior Secured Trade Finance Participations [Member] | Income Approach [Member] | Maximum [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Range (weighted average)	17.50%		12.55%
Level 3 [Member] | Senior Secured Term Loan Participations [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair Value	5,750,000		3,000,000
Level 3 [Member] | Senior Secured Term Loan Participations [Member] | Income Approach [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair Value	3,000,000		3,000,000
Valuation technique	Income approach
Unobservable input	Market yield
Level 3 [Member] | Senior Secured Term Loan Participations [Member] | Income Approach [Member] | Minimum [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Range (weighted average)	12.43%		12.43%
Level 3 [Member] | Senior Secured Term Loan Participations [Member] | Income Approach [Member] | Maximum [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Range (weighted average)			13.10%
Level 3 [Member] | Senior Secured Term Loan Participations [Member] | Collateral Based Approach [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair Value	2,750,000
Valuation technique	Collateral based approach
Unobservable input	Value of collateral
Level 3 [Member] | Secured Mezzanine Term Loan [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair Value			2,952,836
Level 3 [Member] | Secured Mezzanine Term Loan [Member] | Income Approach [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair Value			2,952,836
Level 3 [Member] | Secured Mezzanine Term Loan [Member] | Income Approach [Member] | Minimum [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Range (weighted average)			14.50%

[1] Refer to Note 3 and 4 of the consolidated financial statements for additional information on the Company’s investments.

[2] Refer to Note 3 of the consolidated financial statements for additional information on the Company’s investments.