CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 64,046	$ 63,255
Accounts receivable, net	15,232	11,870
Inventories, net	18,962	18,348
Prepaid expenses and other	1,414	1,624
Total current assets	99,654	95,097
Other assets:
Note receivable from affiliate	25,500	28,100
Goodwill	23,742	23,742
Other noncurrent	590	590
Total other assets	49,832	52,432
Property and equipment:
Land	4,940	4,940
Buildings	23,047	23,047
Equipment	68,443	67,718
Construction in progress	463	1,002
Gross property and equipment	96,893	96,707
Less accumulated depreciation	66,531	65,692
Net property and equipment	30,362	31,015
Total assets	179,848	178,544
Current liabilities:
Accounts payable and accrued liabilities	9,007	12,078
Income taxes payable to affiliates	2,239	984
Total current liabilities	11,246	13,062
Noncurrent liabilities -
Deferred income taxes	3,380	3,287
Stockholders' equity:
Preferred stock
Additional paid-in capital	55,869	55,869
Retained earnings	109,229	106,202
Total stockholders' equity	165,222	162,195
Total liabilities and stockholders’ equity	179,848	178,544
Commitments and contingencies (Note 1)
Class A Common Stock
Stockholders' equity:
Common stock	124	124
Total stockholders' equity	$ 124	$ 124