Income Taxes (Tables)

12 Months Ended

Dec. 31, 2012

Income Tax Disclosure [Abstract]

Schedule of deferred tax assets and liabilities

At December 31, 2012 and 2011, the Company’s deferred tax assets and liabilities are comprised of the following: 

	2012			2011
Deferred income tax assets:
Net operating losses	$	36,764,901		$	32,109,373
Deferred research and development costs	2,950,555			3,674,469
Amortization of intangible assets	1,572,281			1,814,271
Share-based compensation	1,768,990			1,417,093
Depreciation	709,184			777,957
Deferred revenue	4,403,266			—
Other	1,104,612			896,251
Deferred income tax assets	49,273,789			40,689,414
Less: valuation allowance	(4,328,233		)	(4,629,238		)
Deferred income tax assets, net of valuation allowance	$	44,945,556		$	36,060,176
Deferred income tax liabilities:
Amortization of goodwill	(203,682		)	(183,373		)
Capitalized contract costs	(1,017,269		)	—
Deferred income tax assets (liabilities), net	$	43,724,605		$	35,876,803

Schedule of effective income tax rate reconciliation

The Company’s effective tax rate differs from the U.S. Federal Statutory income tax rate of 35% as follows:

	2012 (Revised)		2011 (Restated)		2010 (Restated)
Statutory federal income tax rate	(35.0	)%	(35.0	)%	(34.0	)%
State tax benefit	(1.4	)%	0.3	%	—	%
Loss from fair value of common warrants	(1.3	)%	(123.4	)%	25.8	%
Share-based compensation	0.8	%	24.8	%	—	%
Other	0.5	%	1.4	%	1.0	%
Valuation allowance on deferred tax assets	0.5	%	(387.6	)%	7.5	%
Effective tax rate	(35.9	)%	(519.5	)%	0.3	%