CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited)
Revenues	$ 48,882	$ 42,693	$ 96,020	$ 81,862
Cost of goods sold	28,049	24,826	55,943	47,656
Gross profit	20,833	17,867	40,077	34,206
Operating expenses:
Selling	2,629	1,874	5,146	3,800
General and administrative	5,622	4,753	10,723	8,925
Research and development	1,553	1,445	2,929	2,755
Operating Expenses	9,804	8,072	18,798	15,480
Operating income	11,029	9,795	21,279	18,726
Interest and dividend income	292	183	429	399
Other investment income/(losses)	(308)	963	(548)	1,025
Other income	60	0	85	66
Other Operating Income	44	1,146	(34)	1,490
Income before provision for income taxes	11,073	10,941	21,245	20,216
Provision for income taxes	(1,725)	(2,016)	(3,398)	(3,565)
Net income	$ 9,348	$ 8,925	$ 17,847	$ 16,651
Net income per basic share	$ 5.21	$ 4.89	$ 9.94	$ 9.12
Weighted average basic shares outstanding	1,794	1,826	1,796	1,826
Net income per diluted share	$ 5.20	$ 4.88	$ 9.91	$ 9.10
Weighted average diluted shares outstanding	1,798	1,828	1,800	1,830
Dividends per common share	$ 1.95	$ 1.75	$ 3.90	$ 3.50