Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) shares in Thousands, $ in Thousands	Dec. 31, 2016	Mar. 31, 2016
Accounts receivable, allowance for doubtful accounts	$ 196	$ 407
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	35,000	35,000
Common stock, shares issued (in shares)	11,944	11,387
Common stock, shares outstanding (in shares)	11,848	11,291
Treasury stock, shares (in shares)	96	96