CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited)
Revenues	$ 41,911	$ 44,631	$ 125,742	$ 140,651
Cost of goods sold	28,175	26,978	79,671	82,921
Gross profit	13,736	17,653	46,071	57,730
Operating expenses:
Selling	2,348	2,306	7,392	7,451
General and administrative	5,453	4,493	17,658	15,217
Research and development	1,869	1,251	5,106	4,180
Total operating expense	9,670	8,050	30,156	26,848
Operating income	4,066	9,603	15,915	30,882
Interest and dividend income	320	210	687	639
Other investment income/(losses)	(782)	764	(1,405)	216
Other income	0	7	39	92
Interest Expense	(97)	0	(124)	0
Total other income expense	(559)	981	(803)	947
Income before provision for income taxes	3,507	10,584	15,112	31,829
Provision for income taxes	(568)	(1,745)	(2,125)	(5,143)
Net income	$ 2,939	$ 8,839	$ 12,987	$ 26,686
Net income per basic share	$ 1.67	$ 4.95	$ 7.38	$ 14.89
Weighted average basic shares outstanding	1,760	1,786	1,761	1,793
Net income per diluted share	$ 1.67	$ 4.94	$ 7.37	$ 14.86
Weighted average diluted shares outstanding	1,761	1,788	1,762	1,796
Dividends per common share	$ 2.20	$ 2.15	$ 6.50	$ 6.05