Consolidated Balance Sheets (Parentheticals) - USD ($) shares in Thousands, $ in Thousands	Mar. 31, 2018	Mar. 31, 2017
Accounts receivable, allowance for doubtful accounts	$ 215	$ 114
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)	15,050	12,223
Common stock, shares outstanding (in shares)	14,905	12,078
Treasury stock, shares (in shares)	145	145