CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2015	Mar. 31, 2015
CONDENSED CONSOLIDATED BALANCE SHEETS
Accounts receivable, allowances (in dollars)	$ 250	$ 333
Preferred stock, no par value (in dollars per share)	$ 0	$ 0
Preferred stock, shares authorized	100,000	100,000
Preferred stock, shares issued	0	0
Common stock, par value (in dollars per share)	$ 0.6666	$ 0.6666
Common stock, shares authorized	20,000,000	20,000,000
Common stock, shares issued	7,163,642	7,193,247
Common stock, shares outstanding	7,163,642	7,193,247