Notes Payable - Summary of Components of Total Debt (Detail) - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Debt Payable	$ 123,196,689	$ 109,544,049
M3 [Member]
Debt Instrument [Line Items]
Other Loans Payable	2,134,018
Other Loans-Vehicles [Member]
Debt Instrument [Line Items]
Other Loans Payable		4,402
Credit Agreement Morgan Stanley [Member]
Debt Instrument [Line Items]
Note Payable To Bank	121,493,646	112,500,000
Credit Agreement Morgan Stanley [Member] | PIK Fee [Member]
Debt Instrument [Line Items]
Note Payable To Bank	1,711,940	593,750
Credit Agreement Morgan Stanley [Member] | Net Profits Interest Agreement [Member]
Debt Instrument [Line Items]
Net Profits Interest	$ (2,142,915)	$ (3,554,103)