Consolidated Statements of Stockholders' Equity (Deficit) (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Deficit [Member]
Balance at Dec. 31, 2013	$ 58,327	$ 266	$ 194,038		$ (135,977)
Balance (shares) at Dec. 31, 2013	26,573,023
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued	27,559	10	27,549
Stock issued (shares)	1,017,217
Stock Repurchased During Period	(222)			(222)
Stock compensation	6,901		6,901
Exercise of stock options	1,590	3	1,587
Exercise of stock options (shares)	337,217
Sale of shares under stock purchase plan	233		233
Sale of shares under stock purchase plan (shares)	12,810
Treasury stock (shares)	(10,393)
Net loss	(23,997)				(23,997)
Balance at Sep. 30, 2014	$ 70,391	$ 279	$ 230,308	$ 222	$ (159,974)
Balance (shares) at Sep. 30, 2014	27,929,874