Note 20 - Quarterly Financial Information (Unaudited) - Summarized Quarterly Financial Data (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Net sales	$ 101,498	$ 100,784	$ 100,037	$ 97,753	$ 91,237	$ 96,970	$ 94,343	$ 71,242	$ 400,072	$ 353,792	$ 206,320
Gross profit	26,129	27,750	29,645	28,701	23,279	25,523	24,324	17,134	$ 112,225	$ 90,260	$ 51,114
Net income	$ 11,607	$ 11,694	$ 11,883	$ 9,739	$ 8,462	$ 19,540	$ 8,929	$ 4,858
Basic net income per share (in dollars per share)	$ 1.52	$ 1.53	$ 1.56	$ 1.28	$ 1.12	$ 2.58	$ 1.18	$ 0.64	$ 5.89	$ 5.52	$ 2.11
Diluted net income per share (in dollars per share)	$ 1.51	$ 1.52	$ 1.55	$ 1.27	$ 1.1	$ 2.56	$ 1.17	$ 0.64	$ 5.83	$ 5.45	$ 2.09