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, 2018
Dec. 31, 2017
Statement of Financial Position [Abstract]    
Allowance for doubtful accounts $ 98 $ 103
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) 28,288,764 24,294,084
Common stock, shares outstanding (in shares) 26,932,169 22,937,489
Treasury stock, common shares (in shares) 1,356,595 1,356,595