Consolidated Statements of Cash Flows (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash flows from operating activities:
Net loss	$ (10,213,755)	$ (8,313,090)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	315,909	526,789
Compensation associated with issuance of stock options	437,706	1,355,752
Impairment of goodwill and intangible assets	4,205,000
Accretion of royalty liability	20,350
Changes in assets and liabilities:
Decrease in accounts receivable	2,407,878	2,904,106
Decrease (increase) in prepaid expenses and other current assets	(197,640)	20,332
Decrease (increase) in other assets	(3,304)	9,447
Increase in accounts payable and accrued expenses	1,055,164	854,285
Increase (decrease) in deferred revenue	682,955	(855,051)
Decrease in royalty liability	(102,293)	(95,219)
Increase (decrease) in other long-term liabilities	231	(9,873)
Net cash used in operating activities	(1,391,799)	(3,602,522)
Cash flows from investing activities:
Acquisition of property and equipment	(93,923)	(47,358)
Net cash used in investing activities	(93,923)	(47,358)
Cash flows from financing activities:
Payments on capital lease obligation	(18,896)	(17,504)
Proceeds from exercise of warrants		118,250
Proceeds from employee stock option exercises	42,039	60,552
Net proceeds from issuance of common stock	1,172,946	2,359,382
Net cash provided by financing activities	1,196,089	2,520,680
Net decrease in cash and cash equivalents	(289,633)	(1,129,200)
Cash and cash equivalents at beginning of period	2,112,769	3,385,035
Cash and cash equivalents at end of period	1,823,136	2,255,835
Non-cash financing activities:
Cashless exercise of warrants		133
Cash paid during the period for:
Interest	$ 45,229	$ 2,126