Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2017	Jun. 30, 2017
Accounts payable, due to related parties	$ 77	$ 77
Common stock, shares authorized (in shares)	50,000,000	50,000,000
Common stock, shares issued (in shares)	21,170,074	21,135,174
Common stock, shares outstanding (in shares)	21,170,074	21,135,174
Common stock, par value (in dollars per share)	$ 0.002	$ 0.002
Treasury stock, shares acquired (in shares)	34,900	34,900