CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 51,866	$ 41,393
Marketable securities	23,701	35,354
Accounts receivable, net	17,329	17,061
Inventories, net	27,543	30,712
Prepaid expenses and other	1,807	2,110
Total current assets	122,246	126,630
Other assets:
Note receivable from affiliate	9,800	10,600
Goodwill	23,742	23,742
Other noncurrent assets	747	769
Total other assets	34,289	35,111
Property and equipment:
Land	5,390	5,390
Buildings	23,262	23,239
Equipment	74,650	74,315
Construction in progress	536	676
Gross property and equipment	103,838	103,620
Less accumulated depreciation	78,654	77,757
Net property and equipment	25,184	25,863
Total assets	181,719	187,604
Current liabilities:
Accounts payable and accrued liabilities	9,697	15,745
Income taxes payable to affiliate	1,725	1,460
Total current liabilities	11,422	17,205
Noncurrent liabilities:
Deferred income taxes	1,359	1,509
Other	34	41
Total noncurrent liabilities	1,393	1,550
Stockholders' equity:
Preferred stock	0	0
Additional paid-in capital	53,275	53,275
Retained earnings	115,517	115,457
Accumulated other comprehensive loss - unrealized loss on marketable securities	(11)	(6)
Total stockholders' equity	168,904	168,849
Total liabilities and stockholders' equity	181,719	187,604
Commitments and contingencies (Note 1)
Class A Common Stock
Stockholders' equity:
Class A common stock	$ 123	$ 123