CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 62,450	$ 63,255
Accounts receivable, net	11,340	11,870
Inventories, net	21,818	18,348
Prepaid expenses and other	862	1,624
Total current assets	96,470	95,097
Other assets:
Note receivable from affiliate	30,500	28,100
Goodwill	23,742	23,742
Other noncurrent	590	590
Total other assets	54,832	52,432
Property and equipment:
Land	4,940	4,940
Buildings	23,054	23,047
Equipment	68,739	67,718
Construction in progress	557	1,002
Gross property and equipment	97,290	96,707
Less accumulated depreciation	67,364	65,692
Net property and equipment	29,926	31,015
Total assets	181,228	178,544
Current liabilities:
Accounts payable and accrued liabilities	9,629	12,078
Income taxes payable to affiliates	2,092	984
Total current liabilities	11,721	13,062
Noncurrent liabilities -
Deferred income taxes	3,347	3,287
Stockholders' equity:
Preferred stock
Additional paid-in capital	55,987	55,869
Retained earnings	110,049	106,202
Total stockholders' equity	166,160	162,195
Total liabilities and stockholders’ equity	181,228	178,544
Commitments and contingencies (Note 1)
Class A Common Stock
Stockholders' equity:
Common stock	124	124
Total stockholders' equity	$ 124	$ 124