Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Allowance for doubtful trade receivables	$ 25	$ 108
Common stock, par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized	75,000,000	75,000,000
Common stock, shares issued	30,982,000	31,333,000
Common stock, shares outstanding	30,982,000	31,333,000