CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 52,347	$ 45,570
Accounts receivable	8,760	8,747
Inventories	15,098	16,863
Prepaid expenses and other	704	556
Total current assets	76,909	71,736
Other assets:
Goodwill	23,742	23,742
Other noncurrent	590	599
Total other assets	24,332	24,341
Property and equipment:
Land	4,928	4,928
Buildings	21,231	20,906
Equipment	63,539	61,835
Construction in progress	1,567	909
Property, Plant and Equipment, Gross, Total	91,265	88,578
Less accumulated depreciation	57,714	55,564
Net property and equipment	33,551	33,014
Total assets	134,792	129,091
Current liabilities:
Accounts payable and accrued liabilities	11,618	12,796
Income taxes payable to affiliates	470	433
Total current liabilities	12,088	13,229
Noncurrent liabilities -
deferred income taxes	$ 5,001	$ 4,876
Stockholders' equity:
Preferred stock, $.01 par value; 1,000 shares authorized, none issued
Additional paid-in capital	$ 55,422	$ 55,342
Retained earnings	62,157	55,520
Total stockholders' equity	117,703	110,986
Total liabilities and stockholders’ equity	$ 134,792	$ 129,091
Commitments and contingencies (Note 10)
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