Consolidated Balance Sheets (Parenthetical) - USD ($) $ / shares in Units, $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	19,585,777	19,585,777
Common stock, shares issued	19,359,586	19,165,954
Treasury stock, shares	226,191	419,823
Accounts Receivable, Allowance for Credit Loss, Current	$ 6,557	$ 5,140