Consolidated Statements of Stockholders' Equity (USD $) In Thousands, except Share data	Total	Common Stock	Treasury Stock	Additional Paid in Capital	Accumulated Deficit	Accumulated Other Comprehensive (Loss) Income
Beginning Balance at Mar. 31, 2011	$ 104,743	$ 377	$ (827)	$ 379,218	$ (274,770)	$ 745
Beginning Balance (in shares) at Mar. 31, 2011		37,705,765	50,954
Stock options exercised (in shares)		1,516,038
Stock options exercised	14,257	15		14,242
Stock issued under employee stock purchase plan (in shares)		45,445
Stock issued under employee stock purchase plan	423	1		422
Stock issued to directors (in shares)		5,506
Stock issued to directors	116			116
Stock compensation expense	7,773			7,773
Other comprehensive income (loss)	(2,510)					(2,510)
Net income (loss)	1,495				1,495
Ending Balance at Mar. 31, 2012	126,297	393	(827)	401,771	(273,275)	(1,765)
Ending Balance (in shares) at Mar. 31, 2012		39,272,754	50,954
Restricted stock issued (in shares)		91,503
Restricted stock issued		1		(1)
Stock options exercised (in shares)		337,212
Stock options exercised	2,936	3		2,933
Stock issued under employee stock purchase plan (in shares)		33,132
Stock issued under employee stock purchase plan	555			555
Stock issued to directors (in shares)		2,828
Stock issued to directors	51			51
Repurchase of common stock (in shares)		(1,123,587)	1,123,587
Repurchase of common stock	(15,045)		(15,045)
Return of common stock to pay withholding taxes on restricted stock (in shares)		(12,458)	12,458
Return of common stock to pay withholding taxes on restricted stock	(257)		(257)
Stock compensation expense	9,501			9,501
Other comprehensive income (loss)	(1,972)					(1,972)
Net income (loss)	15,014				15,014
Ending Balance at Mar. 31, 2013	137,080	397	(16,129)	414,810	(258,261)	(3,737)
Ending Balance (in shares) at Mar. 31, 2013		38,601,384	1,186,999
Restricted stock issued (in shares)		254,991
Restricted stock issued		3		(3)
Stock options exercised (in shares)	1,029,000	1,029,024
Stock options exercised	9,360	11		9,349
Stock issued under employee stock purchase plan (in shares)		43,779
Stock issued under employee stock purchase plan	697			697
Stock issued to directors (in shares)		6,518
Stock issued to directors	65			65
Return of common stock to pay withholding taxes on restricted stock (in shares)		(19,368)	19,368
Return of common stock to pay withholding taxes on restricted stock	(425)		(425)
Stock compensation expense	11,218			11,218
Other comprehensive income (loss)	3,007					3,007
Net income (loss)	7,351				7,351
Ending Balance at Mar. 31, 2014	$ 168,353	$ 411	$ (16,554)	$ 436,136	$ (250,910)	$ (730)
Ending Balance (in shares) at Mar. 31, 2014		39,916,328	1,206,367