Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Accounts receivable, reserves	$ 183	$ 196
Inventories, reserves	$ 686	$ 681
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	2,000,000	2,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	75,000,000	75,000,000
Common stock, shares issued	36,535,636	35,915,636
Common stock, shares outstanding	21,570,439	22,666,072
Treasury stock, shares	14,965,197	13,249,564