Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2012	Mar. 31, 2012
Allowance for Doubtful Accounts (in Dollars)	$ 30	$ 58
Preferred Stock Par Value (in Dollars per share)	$ 0.01	$ 0.01
Preferred Stock, Authorized Shares	5,000,000	5,000,000
Preferred Stock, Shares Issued	0	0
Preferred Stock, Shares Outstanding	0	0
Common Stock, Par Value (in Dollars per share)	$ 0.01	$ 0.01
Common Stock, Authorized Shares	75,000,000	75,000,000
Common Stock, Shares Issued	46,241,000	45,396,000
Common Stock, Shares Outstanding	46,241,000	45,396,000
Treasury Stock, Shares	24,000	7,000