CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2011	Mar. 31, 2011
CONDENSED CONSOLIDATED BALANCE SHEETS
Accounts receivable, allowances (in dollars)	$ 353	$ 334
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	8,915,469	9,169,965
Common stock, shares outstanding	8,915,469	9,169,965