CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - 9 months ended Sep. 30, 2015 - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Stock [Member]	Series A Nonconvertible Preferred Stock [Member] Preferred Stock [Member]
BALANCE (in shares) at Dec. 31, 2014		47,061,826				1,357,863	200,000
BALANCE at Dec. 31, 2014	$ 448,742	$ 471	$ 581,114	$ (88,305)	$ (4,382)	$ (40,158)	$ 2
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Net loss	(3,410)			(3,410)
Other comprehensive income	704				704
Exercise of common stock options, shares		215,390
Exercise of common stock options	1,629	$ 2	1,627
Issuance of common stock to employees, shares		296,098
Issuance of common stock to employees	7,655	$ 3	7,652
Shares withheld for employee taxes, shares		(124,271)
Shares withheld for employee taxes	(5,313)	$ (1)	(5,312)
Issuance of common stock to Board of Directors and Scientific Advisory Board Shares		36,851
Issuance of common stock to Board of Directors and Scientific Advisory Board Value	1,118	$ 0	1,118
Issuance of common stock to employees under an Employee Stock Purchase Plan (ESPP) (in shares)		9,044
Issuance of common stock to employees under an ESPP	334	$ 0	334
BALANCE (in shares) at Sep. 30, 2015		47,494,938				1,357,863	200,000
BALANCE at Sep. 30, 2015	$ 451,459	$ 475	$ 586,533	$ (91,715)	$ (3,678)	$ (40,158)	$ 2