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CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Current assets:    
Cash and cash equivalents $ 17,987 $ 26,748
Marketable securities 42,963 33,147
Accounts receivable, net 18,681 17,840
Inventories, net 30,235 31,290
Prepaid expenses and other 1,950 2,136
Total current assets 111,816 111,161
Other assets:    
Note receivable from affiliate 12,200 13,200
Goodwill 23,742 23,742
Other noncurrent assets 816 590
Total other assets 36,758 37,532
Property and equipment:    
Land 5,390 5,390
Buildings 23,181 23,181
Equipment 74,376 74,113
Construction in progress 399 722
Gross property and equipment 103,346 103,406
Less accumulated depreciation 75,432 74,712
Net property and equipment 27,914 28,694
Total assets 176,488 177,387
Current liabilities:    
Accounts payable and accrued liabilities 11,035 15,618
Income taxes payable to affiliate 2,033 1,035
Total current liabilities 13,068 16,653
Noncurrent liabilities:    
Deferred income taxes 1,967 2,230
Other 56 68
Total noncurrent liabilities 2,023 2,298
Stockholders' equity:    
Additional paid-in capital 53,155 53,155
Retained earnings 108,166 105,175
Accumulated other comprehensive loss - unrealized loss on marketable securities (47) (17)
Total stockholders' equity 161,397 158,436
Total liabilities and stockholders' equity 176,488 177,387
Commitments and contingencies (Note 1)
Class A Common Stock    
Stockholders' equity:    
Common stock $ 123 $ 123