Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2012	Mar. 31, 2012
Consolidated Balance Sheets
Trade accounts receivable, allowance for doubtful accounts (in dollars)	$ 380	$ 379
Preferred stock, par value (in dollars per share)	$ 1.00	$ 1.00
Preferred stock, Authorized shares	2,000	2,000
Preferred stock, Issued shares	0	0
Preferred stock, outstanding shares	0	0
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common stock, Authorized shares	70,000	70,000
Common stock, Issued shares	33,690	33,909
Common stock, outstanding shares	33,690	33,909