Consolidated Statements of Operations (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenues:
Product revenues	$ 17,723,000	$ 27,338,557	$ 41,358,621
Support and services revenues	28,550,515	31,297,947	34,052,348
Total revenues	46,273,515	58,636,504	75,410,969
Cost of revenues:
Product	2,791,950	4,155,413	8,215,152
Support and service	7,838,766	11,000,401	12,446,921
Total cost of revenues	10,630,716	15,155,814	20,662,073
Gross profit	35,642,799	43,480,690	54,748,896
Operating expenses:
Research and development costs	12,452,528	15,613,543	18,950,084
Selling and marketing	24,426,438	25,222,954	35,694,899
General and administrative	9,105,545	12,265,038	13,334,475
Investigation, litigation, and settlement related (benefits) costs	(5,417,925)	373,619	(326,408)
Restructuring costs	1,135,310	3,606,020	770,749
Total operating expenses	41,701,896	57,081,174	68,423,799
Operating loss	(6,059,097)	(13,600,484)	(13,674,903)
Interest and other (loss) income, net	(642,633)	1,094,126	(523,011)
Loss before income taxes	(6,701,730)	(12,506,358)	(14,197,914)
Provision (benefit) for income taxes	510,091	(1,573,768)	786,407
Net loss	(7,211,821)	(10,932,590)	(14,984,321)
Less: Accrual of Series A redeemable convertible preferred stock dividends	747,616	216,379	0
Less: Accretion to redemption value of Series A redeemable convertible preferred stock	493,363	127,504	0
Net loss attributable to common stockholders	$ (8,452,800)	$ (11,276,473)	$ (14,984,321)
Earnings per share
Basic net loss per share attributable to common stockholders (in dollars per share)	$ (0.18)	$ (0.24)	$ (0.32)
Diluted net loss per share attributable to common stockholders (in dollars per share)	$ (0.18)	$ (0.24)	$ (0.32)
Weighted average basic shares outstanding (in shares)	46,265,225	47,979,467	47,408,995
Weighted average diluted shares outstanding (in shares)	46,265,225	47,979,467	47,408,995