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Condensed Consolidated Balance Sheets (Parentheticals) - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Statement of Financial Position [Abstract]    
Trade accounts receivable, allowances $ 101 $ 155
Preferred stock, par value (in dollars per share) $ 0.0001 $ 0.0001
Preferred stock, shares authorized 2,000,000 2,000,000
Preferred stock, shares issued 0 0
Preferred stock, shares outstanding 0 0
Common stock, par value (in dollars per share) $ 0.0001 $ 0.0001
Common stock, shares authorized 30,000,000 30,000,000
Common stock, shares issued 11,652,739 11,648,978
Common stock, shares outstanding 11,652,739 11,648,978