CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Jun. 30, 2013	Mar. 31, 2013
Current assets:
Receivables, allowances	$ 223	$ 319
Shareholders' equity:
Preferred stock, par value (in dollars per share)	$ 0.00	$ 0.00
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.00	$ 0.00
Common stock, shares authorized (in shares)	35,000,000	35,000,000
Common stock, shares issued (in shares)	22,283,000	22,120,000
Common stock, shares outstanding (in shares)	22,283,000	22,120,000