Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Mar. 31, 2014
Consolidated Balance Sheets
Trade accounts receivable, allowance for doubtful accounts (in dollars)	$ 314	$ 532
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
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common stock, Authorized shares	70,000	70,000
Common stock, Issued shares	32,554	32,788
Common stock, outstanding shares	32,554	32,788