Income Taxes - Components of Income Tax Benefit (Detail) (USD $)	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Current:
Federal	$ 0us-gaap_CurrentFederalTaxExpenseBenefit	$ 0us-gaap_CurrentFederalTaxExpenseBenefit
State	57,679	23,000
Total	57,679us-gaap_CurrentIncomeTaxExpenseBenefit	23,000us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred:
Federal	(425,159)	(732,189)
State	(71,295)	(26,130)
Total	(496,454)us-gaap_DeferredIncomeTaxExpenseBenefit	(758,319)us-gaap_DeferredIncomeTaxExpenseBenefit
Income tax benefit	$ (438,775)us-gaap_IncomeTaxExpenseBenefit	$ (735,319)us-gaap_IncomeTaxExpenseBenefit

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.

Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred state and local tax expense (benefit) pertaining to income (loss) from continuing operations.