Annual report pursuant to Section 13 and 15(d)

CONSOLIDATED BALANCE SHEETS (Parentheticals)

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CONSOLIDATED BALANCE SHEETS (Parentheticals) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Statement of Financial Position [Abstract]    
Allowance for doubtful accounts $ 53 $ 121
Common stock, par value (in dollars per share) $ 0.0001 $ 0.0001
Common stock, shares authorized (in shares) 100,000,000 100,000,000
Common stock, shares issued (in shares) 24,221,558 20,325,991
Common stock, shares outstanding (in shares) 22,864,963 18,969,396
Treasury stock, common shares (in shares) 1,356,595 1,356,595