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CONSOLIDATED BALANCE SHEETS (Parentheticals) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Accounts receivable, allowance for doubtful accounts $ 1,547 $ 1,487
Preferred stock, par value (in dollars per share) $ 0.001 $ 0.001
Preferred stock, shares authorized (in shares) 5,000,000 5,000,000
Preferred stock, shares issued (in shares) 0 0
Preferred stock, shares outstanding (in shares) 0 0
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized (in shares) 30,000,000 30,000,000
Common stock, shares outstanding (in shares) 25,455,000 20,804,000
Treasury stock, shares (in shares) 330,000 293,000
Term Loan Current    
Term loan, unamortized discount and prepaid costs $ 4,036 $ 2,133
Term Loan Noncurrent    
Term loan, unamortized discount and prepaid costs $ 9,508 $ 7,655