CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 2,773	$ 2,605
Preferred stock, par value (in dollars per share)	$ 0.05	$ 0.05
Preferred stock, shares authorized (in share)	4,000,000	4,000,000
Preferred stock, shares issued (in share)	0	0
Preferred stock, shares outstanding (in share)	0	0
Common stock, par value (in dollars per share)	$ 0.05	$ 0.05
Common stock, shares authorized (in share)	25,000,000	25,000,000
Common stock, issued (in shares)	19,920,829	15,917,559
Treasury stock, shares (in share)	570,415	528,274