CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 41,393	$ 26,748
Marketable securities	35,354	33,147
Accounts receivable, net	17,061	17,840
Inventories, net	30,712	31,290
Prepaid expenses and other	2,110	2,136
Total current assets	126,630	111,161
Other assets:
Note receivable from affiliate	10,600	13,200
Goodwill	23,742	23,742
Other noncurrent assets	769	590
Total other assets	35,111	37,532
Property and equipment:
Land	5,390	5,390
Buildings	23,239	23,181
Equipment	74,315	74,113
Construction in progress	676	722
Gross property and equipment	103,620	103,406
Less accumulated depreciation	77,757	74,712
Net property and equipment	25,863	28,694
Total assets	187,604	177,387
Current liabilities:
Accounts payable and accrued liabilities	15,745	15,618
Income taxes payable to affiliate	1,460	1,035
Total current liabilities	17,205	16,653
Noncurrent liabilities:
Deferred income taxes	1,509	2,230
Other	41	68
Total noncurrent liabilities	1,550	2,298
Stockholders' equity:
Preferred stock, $.01 par value; 1,000 shares authorized, none issued
Class A common stock, $.01 par value; 20,000,000 shares authorized 12,307,157 and 12,313,757 shares issued and outstanding	123	123
Additional paid-in capital	53,275	53,155
Retained earnings	115,457	105,175
Accumulated other comprehensive loss - unrealized loss on marketable securities	(6)	(17)
Total stockholders' equity	168,849	158,436
Total liabilities and stockholders' equity	$ 187,604	$ 177,387