Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 29, 2014	Dec. 28, 2013
Current Assets:
Cash and cash equivalents	$ 27,976	$ 49,524
Accounts receivable, net of allowance for doubtful accounts of $335 and $160 as of March 29, 2014 and December 28, 2013, respectively	45,967	42,001
Inventories	61,007	56,397
Prepaid expenses and other assets	15,809	10,644
Deferred income taxes	5,712	5,712
Total current assets	156,471	164,278
Property, plant and equipment, net	309,082	266,558
Other assets	10,127	9,556
Goodwill	3,683	3,683
Total assets	479,363	444,075
Current Liabilities:
Accounts payable	38,905	34,424
Current portion of long-term debt and capital lease obligations	55	53
Accrued expenses and other current liabilities	59,246	69,900
Total current liabilities	98,206	104,377
Deferred income taxes	32,297	32,394
Debt and capital lease obligations, less current portion	528	584
Other liabilities	4,232	4,635
Total liabilities	135,263	141,990
Commitments and Contingencies
Stockholders' Equity:
Additional paid-in capital	206,724	173,025
Accumulated other comprehensive loss, net of tax	(417)	(417)
Retained earnings	137,664	129,349
Total stockholders' equity	344,100	302,085
Total liabilities and stockholders' equity	479,363	444,075
Common Class A
Stockholders' Equity:
Common Stock	91	88
Common Class B
Stockholders' Equity:
Common Stock	$ 38	$ 40