CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 17,595	$ 26,748
Marketable securities	46,774	33,147
Accounts receivable, net	19,735	17,840
Inventories, net	34,282	31,290
Prepaid expenses and other	2,152	2,136
Total current assets	120,538	111,161
Other assets:
Note receivable from affiliate	12,000	13,200
Goodwill	23,742	23,742
Other noncurrent assets	738	590
Total other assets	36,480	37,532
Property and equipment:
Land	5,390	5,390
Buildings	23,181	23,181
Equipment	74,486	74,113
Construction in progress	512	722
Gross property and equipment	103,569	103,406
Less accumulated depreciation	77,347	74,712
Net property and equipment	26,222	28,694
Total assets	183,240	177,387
Current liabilities:
Accounts payable and accrued liabilities	15,047	15,618
Income taxes payable to affiliate	1,351	1,035
Total current liabilities	16,398	16,653
Noncurrent liabilities:
Deferred income taxes	1,651	2,230
Other	43	68
Total noncurrent liabilities	1,694	2,298
Stockholders' equity:
Preferred stock	0	0
Additional paid-in capital	53,275	53,155
Retained earnings	111,839	105,175
Unrealized loss arising during year, net	(89)	(17)
Total stockholders' equity	165,148	158,436
Total liabilities and stockholders' equity	183,240	177,387
Commitments and contingencies (Note 1)
Class A Common Stock
Stockholders' equity:
Common stock	$ 123	$ 123