Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Jun. 30, 2014	Mar. 31, 2014
Statement of Financial Position [Abstract]
Accounts receivable, allowances for doubtful accounts	$ 72	$ 162
Property and equipment, accumulated depreciation	25,106	23,785
Other intangible assets, accumulated amortization	$ 3,728	$ 3,447
Preferred stock, par value (per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	0	0
Common stock, par value (per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	30,000,000	30,000,000
Common stock, shares issued (in shares)	12,291,000	12,213,000
Common stock, shares outstanding (in shares)	12,291,000	12,213,000