Income Taxes - Schedule of Income (Loss) Before Income Taxes (Detail) (USD $)	3 Months Ended	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2013	Jun. 30, 2012
Income Tax Disclosure [Abstract]
Expected (benefit)		$ (6,956,609)	$ (7,164,530)
U.S. income tax expense at the AMT 20% rate		100,742
State income taxes net of federal benefits		97,489	(191,873)
Nondeductible expense		12,895	8,050
Stock options and restricted stock awards		208,890	240,265
Gain on sale of subsidiary stock		8,454,148
Derivatives		(13,721)	1,667,465
Change in valuation allowance		(2,174,824)	5,203,811
Effects of:
Change in apportionment estimate		400,067
Change in net operating loss estimate		2,240	610,863
Change in capital loss carryover estimate			(374,051)
Other, net		(30,575)
Income tax provision	$ (50,000)	$ 100,742