CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2016	Mar. 31, 2015
Current assets:
Receivables, allowances	$ 479	$ 247
Shareholders' equity:
Preferred stock, par value (in dollars per share)	$ 0	$ 0
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	$ 0
Common stock, shares authorized (in shares)	35,000,000	35,000,000
Common stock, shares issued (in shares)	22,408,000	22,539,000
Common stock, shares outstanding (in shares)	22,408,000	22,539,000