CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Dec. 31, 2021	Dec. 31, 2020
Stockholders’ equity:
Preferred stock, par value (in dollars per share)	$ 0.02	$ 0.02
Preferred stock, authorized (in shares)	1,000,000	1,000,000
Preferred stock, outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.02	$ 0.02
Common stock, authorized (in shares)	58,000,000	58,000,000
Common stock, issued (in shares)	28,094,333	22,982,955
Common stock, outstanding (in shares)	26,924,397	21,917,357
Treasury stock, at cost (in shares)	1,181,449	1,065,598