Quarterly report pursuant to Section 13 or 15(d)

CONSOLIDATED BALANCE SHEETS (Parentheticals)

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CONSOLIDATED BALANCE SHEETS (Parentheticals) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Statement of Financial Position [Abstract]    
Allowance for doubtful accounts $ 122 $ 53
Accumulated amortization of intangible assets $ 7,756 $ 7,732
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) 24,247,418 24,221,558
Common stock, shares outstanding (in shares) 22,890,823 22,864,963
Treasury stock, common shares (in shares) 1,356,595 1,356,595