Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 1,722	$ 1,589
Preferred stock, par value (usd per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	1,000,000	1,000,000
Preferred stock, shares issued (in shares)	0	0
Common stock, par value (usd per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	30,000,000	30,000,000
Common stock, shares issued (in shares)	19,419,121	19,398,699
Common stock, shares outstanding (in shares)	17,986,427	18,001,261
Treasury stock, shares outstanding (in shares)	1,432,694	1,397,438

Amount of allowance for credit loss on accounts receivable, classified as current.

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