Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Mar. 31, 2013
Accounts receivable, allowances (in Dollars)	$ 94	$ 113
Preferred Stock Par Value (in Dollars per share)	$ 0.01	$ 0.01
Preferred Stock, Authorized Shares (in Shares)	5,000,000	5,000,000
Preferred Stock, Shares Issued (in Shares)	0	0
Preferred Stock, Shares Outstanding (in Shares)	0	0
Common Stock, Par Value (in Dollars per share)	$ 0.01	$ 0.01
Common Stock, Authorized Shares (in Shares)	75,000,000	75,000,000
Common Stock, Shares Issued (in Shares)	46,414,000	46,249,000
Common Stock, Shares Outstanding (in Shares)	46,414,000	46,249,000
Treasury Stock, Shares (in Shares)	59,000	34,000