Quarterly Results of Operations (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Quarterly Results of Operations (Unaudited)
Net sales	$ 75,508	$ 68,911	$ 75,350	$ 62,813	$ 71,445	$ 60,919	$ 56,586	$ 62,618	$ 282,582	$ 251,568
Gross profit	12,575	11,319	10,979	10,843	10,525	7,237	7,114	8,164	45,716	33,040
Net income	$ 3,447	$ 2,440	$ 1,791	$ 1,520	$ 2,527	$ 530	$ 581	$ 836	$ 9,198	$ 4,474
Basic net income per share	$ 0.78	$ 0.55	$ 0.41	$ 0.35	$ 0.58	$ 0.13	$ 0.13	$ 0.18	$ 2.09	$ 1.01
Diluted net income per share	$ 0.78	$ 0.55	$ 0.41	$ 0.35	$ 0.58	$ 0.13	$ 0.13	$ 0.18	$ 2.09	$ 1.01