Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2015	Mar. 31, 2015
Statement of Financial Position [Abstract]
Accounts receivable, allowances for doubtful accounts	$ 69	$ 179
Property and equipment, accumulated depreciation	30,929	29,121
Other intangible assets, accumulated amortization	$ 4,669	$ 4,203
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)	75,000,000	75,000,000
Common stock, shares issued (in shares)	15,339,000	15,251,000
Common stock, shares outstanding (in shares)	15,339,000	15,251,000