CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 30,113	$ 33,153
Accounts receivable, net	12,988	10,347
Inventories, net	15,347	14,974
Prepaid expenses and other	779	701
Total current assets	59,227	59,175
Other assets:
Note receivable from affiliate	29,000	27,400
Goodwill	23,742	23,742
Other noncurrent	590	590
Total other assets	53,332	51,732
Property and equipment:
Land	4,935	4,935
Buildings	22,541	22,541
Equipment	65,773	65,570
Construction in progress	783	1,098
Gross property and equipment	94,032	94,144
Less accumulated depreciation	61,319	61,071
Net property and equipment	32,713	33,073
Total assets	145,272	143,980
Current liabilities:
Accounts payable and accrued liabilities	9,528	11,882
Income taxes payable to affiliates	2,520	1,441
Total current liabilities	12,048	13,323
Noncurrent liabilities -
Deferred income taxes	4,924	4,887
Stockholders' equity:
Preferred stock
Additional paid-in capital	55,515	55,515
Retained earnings	72,661	70,131
Total stockholders' equity	128,300	125,770
Total liabilities and stockholders’ equity	145,272	143,980
Commitments and contingencies (Note 1)
Class A Common Stock
Stockholders' equity:
Common stock	24	24
Total stockholders' equity	24	24
Class B Common Stock
Stockholders' equity:
Common stock	100	100
Total stockholders' equity	$ 100	$ 100