Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data	Sep. 30, 2011	Mar. 31, 2011
Condensed Consolidated Balance Sheets [Abstract]
Accounts and notes receivable, allowances for doubtful accounts	$ 610	$ 645
Property and equipment, accumulated depreciation	15,249	13,750
Other intangible assets, accumulated amortization	$ 1,158	$ 724
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	30,000,000	30,000,000
Common stock, shares issued	11,004,000	11,243,000
Common stock, shares outstanding	11,004,000	11,243,000