Income Taxes - Reconciliation of Effective Tax Rate and the Federal Statutory Tax Rate (Detail)	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Federal statutory tax rate	34.00%	34.00%	34.00%
State income taxes, net of federal income tax benefit	4.41%	3.37%	1.77%
Non-deductible expenses	(29.17%)	5.89%	1.89%
Non-deductible stock options and warrants	(10.24%)	4.00%	14.45%
Non-deductible tax expense	0.00%	8.79%
Prior year adjustments for stock compensation	(0.26%)	(27.93%)
Other, net			0.26%
Valuation allowance	49.49%	(15.96%)	(45.44%)
Effective tax rate	48.23%	12.16%	6.93%

Effective income tax rate reconciliation, nondeductible tax expense.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to revisions of previously reported income tax expense.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit).

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