Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Total
Balance at Mar. 31, 2014	$ 3,280	$ 135,986	$ (81,776)	$ 57,490
Balance (in shares) at Mar. 31, 2014	32,788,000
Increase (Decrease) in Stockholders' Equity
Stock option exercises	$ 2	31		33
Stock option exercises (in shares)	24,000
Stock-based compensation		398		398
Issuance of shares pursuant to vesting of restricted stock units, net of payroll withholding taxes	$ 7	(27)		(20)
Issuance of shares pursuant to vesting of restricted stock units, net of payroll withholding taxes (in shares)	72,000
Repurchases of common stock	$ (47)	(816)		$ (863)
Repurchases of common stock (in shares)	(473,000)			(473,000)
Net loss			(1,070)	$ (1,070)
Balance at Mar. 31, 2015	$ 3,242	135,572	(82,846)	55,968
Balance (in shares) at Mar. 31, 2015	32,411,000
Increase (Decrease) in Stockholders' Equity
Stock option exercises	$ 24	359		383
Stock option exercises (in shares)	243,000
Stock-based compensation		659		659
Issuance of shares pursuant to vesting of restricted stock units, net of payroll withholding taxes	$ 5	(37)		(32)
Issuance of shares pursuant to vesting of restricted stock units, net of payroll withholding taxes (in shares)	50,000
Repurchases of common stock	$ (66)	(1,129)		$ (1,195)
Repurchases of common stock (in shares)	(656,000)			(656,000)
Net loss			(12,321)	$ (12,321)
Balance at Mar. 31, 2016	$ 3,205	135,424	(95,167)	$ 43,462
Balance (in shares) at Mar. 31, 2016	32,048,000			32,048,000
Increase (Decrease) in Stockholders' Equity
Stock option exercises	$ 40	628		$ 668
Stock option exercises (in shares)	388,000
Stock-based compensation		976		976
Issuance of shares pursuant to vesting of restricted stock units, net of payroll withholding taxes	$ 4	(60)		(56)
Issuance of shares pursuant to vesting of restricted stock units, net of payroll withholding taxes (in shares)	52,000
Net loss			(4,826)	(4,826)
Balance at Mar. 31, 2017	$ 3,249	$ 136,968	$ (99,993)	$ 40,224
Balance (in shares) at Mar. 31, 2017	32,488,000			32,488,000