Consolidated Statements of Stockholders' Equity and Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	Total	Common Stock	Additional Paid-In Capital	Common Stock Held in Trust	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)	Comprehensive Income
Balance at Mar. 31, 2009	$ 55,358	$ 3,420	$ 136,997	$ (31)	$ (85,025)	$ (3)
Balance (in shares) at Mar. 31, 2009		34,205
Increase (Decrease) in Stockholders' Equity
Cumulative effect of adoption of change in accounting for warrants	(47)				(47)
Stock option exercises	143	12	131
Stock option exercises (in shares)		113
Stock-based compensation	375		375
Issuance of shares held in trust	31			31
Components of comprehensive income:
Foreign currency translation	3					3	3
Net income	2,203				2,203		2,203
Comprehensive income	2,206						2,206
Balance at Mar. 31, 2010	58,066	3,432	137,503		(82,869)
Balance (in shares) at Mar. 31, 2010		34,318
Increase (Decrease) in Stockholders' Equity
Stock option exercises	57	4	53
Stock option exercises (in shares)		46
Stock-based compensation	382		382
Components of comprehensive income:
Net income	(5,209)
Net income (loss) and comprehensive income (loss)	(5,209)				(5,209)		(5,209)
Balance at Mar. 31, 2011	53,296	3,436	137,938		(88,078)
Balance (in shares) at Mar. 31, 2011	34,364	34,364
Increase (Decrease) in Stockholders' Equity
Stock option exercises	85	8	77
Stock option exercises (in shares)		68
Stock-based compensation	331		331
Issuance of shares pursuant to vesting of restricted stock units		5	(5)
Issuance of shares pursuant to vesting of restricted stock units (in shares)		51
Repurchases of common stock	(754)	(58)	(696)
Repurchases of common stock (in shares)		(574)
Components of comprehensive income:
Net income	2,514
Net income (loss) and comprehensive income (loss)	2,514				2,514		2,514
Balance at Mar. 31, 2012	$ 55,472	$ 3,391	$ 137,645		$ (85,564)
Balance (in shares) at Mar. 31, 2012	33,909	33,909