CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 70,172	$ 41,393
Marketable securities	11,934	35,354
Accounts receivable, net	15,435	17,061
Inventories, net	27,363	30,712
Prepaid expenses and other	1,768	2,110
Total current assets	126,672	126,630
Other assets:
Note receivable from affiliate	9,200	10,600
Goodwill	23,742	23,742
Other noncurrent assets	723	769
Total other assets	33,665	35,111
Property and equipment:
Land	5,390	5,390
Buildings	23,262	23,239
Equipment	74,651	74,315
Construction in progress	770	676
Gross property and equipment	104,073	103,620
Less accumulated depreciation	79,336	77,757
Net property and equipment	24,737	25,863
Total assets	185,074	187,604
Current liabilities:
Accounts payable and accrued liabilities	13,164	15,745
Income taxes payable to affiliate	560	1,460
Total current liabilities	13,724	17,205
Noncurrent liabilities:
Deferred income taxes	1,141	1,509
Other	26	41
Total noncurrent liabilities	1,167	1,550
Stockholders' equity:
Preferred stock	0	0
Additional paid-in capital	53,396	53,275
Retained earnings	116,665	115,457
Accumulated other comprehensive loss - unrealized loss on marketable securities	(1)	(6)
Total stockholders' equity	170,183	168,849
Total liabilities and stockholders' equity	185,074	187,604
Commitments and contingencies (Note 8)
Class A Common Stock
Stockholders' equity:
Class A common stock	$ 123	$ 123