Schedule of Capital Lease Obligations (Detail) - USD ($)		6 Months Ended
		Jun. 30, 2016	Dec. 31, 2015
Operating Leased Assets [Line Items]
Capital Leases Obligations:		$ 32,444,759	$ 33,609,661
Less: Current portion of capital leases		(4,071,318)	(4,478,968)
Capital leases obligations		28,373,441	29,130,693
Building
Operating Leased Assets [Line Items]
Capital Leases Obligations:		24,168,540	24,424,341
Equipment
Operating Leased Assets [Line Items]
Capital Leases Obligations:		$ 8,276,219	$ 9,185,320
Capital Lease Obligations | Building
Operating Leased Assets [Line Items]
Debt instrument, effective interest rate	[1]	7.50%
Debt instrument maturity date		2036-07
Capital Lease Obligations | Minimum
Operating Leased Assets [Line Items]
Debt instrument, effective interest rate		5.10%
Capital Lease Obligations | Minimum | Equipment
Operating Leased Assets [Line Items]
Debt instrument, effective interest rate	[1]	5.60%
Debt instrument maturity date		2017-03
Capital Lease Obligations | Maximum
Operating Leased Assets [Line Items]
Debt instrument, effective interest rate		9.10%
Capital Lease Obligations | Maximum | Equipment
Operating Leased Assets [Line Items]
Debt instrument, effective interest rate	[1]	9.00%
Debt instrument maturity date		2020-12

[1] Effective rate as of June 30, 2016