Consolidated Balance Sheets - USD ($) $ in Thousands	Apr. 01, 2017	Dec. 31, 2016
Current Assets:
Cash and cash equivalents	$ 59,893	$ 91,035
Accounts receivable, net of allowance for doubtful accounts of $4 and $0 as of April 1, 2017 and December 31, 2016, respectively	35,314	36,694
Inventories	54,444	52,499
Prepaid expenses and other current assets	9,524	8,731
Income tax receivable	6,898	4,928
Total current assets	166,073	193,887
Property, plant and equipment, net	404,426	408,411
Other assets	12,773	9,965
Goodwill	3,683	3,683
Total assets	586,955	615,946
Current Liabilities:
Accounts payable	36,072	40,585
Accrued expenses and other current liabilities	48,406	60,934
Total current liabilities	84,478	101,519
Deferred income taxes, net	57,378	57,261
Other liabilities	9,688	10,584
Total liabilities	151,544	169,364
Commitments and Contingencies (See Note E)
Stockholders' Equity:
Additional paid-in capital	366,297	349,913
Accumulated other comprehensive loss, net of tax	(1,102)	(1,103)
Retained earnings	70,093	97,648
Total stockholders' equity	435,411	446,582
Total liabilities and stockholders' equity	586,955	615,946
Common Class A
Stockholders' Equity:
Common Stock	92	92
Common Class B
Stockholders' Equity:
Common Stock	$ 31	$ 32