Income Taxes - Reconciliation of Income Tax Computed at Federal Statutory Rate (Detail) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Income Tax (Expense) Benefit Computed at Federal Statutory Rate									$ (4,481,029)	$ (3,575,138)	$ (1,558,626)
Increase (Decrease) Resulting from:
State Income Tax, Net of Federal Income Tax Benefit									(755,481)	(349,334)	(149,791)
Other Reconciling Items									(32,594)	93,609	(183,263)
Benefit (Expense) for Income Taxes	$ (3,547,208)	$ (1,349,480)	$ (147,928)	$ (224,488)	$ (442,380)	$ (1,984,741)	$ (453,984)	$ (949,758)	$ (5,269,104)	$ (3,830,863)	$ (1,891,680)