CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 29, 2013	Jun. 30, 2012
Cash flows from operating activities
Net (loss) income	$ (10,071)	$ 9,388
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	4,284	2,862
Deferred income taxes	(333)	(64)
Excess tax benefits from stock-based compensation		(709)
Stock based compensation	1,098	1,288
Amortization of premiums and discounts on investments, net	93	152
Loss on disposal of property and equipment	47	58
Impairment of long-lived assets	10,358
Changes in assets and liabilities:
Accounts receivable	3,545	1,549
Inventories	(2,237)	3,038
Prepaid expenses and other current assets	(3,222)	(2,225)
Merchandise accounts payable	(197)	(6,444)
Accrued expenses and other current liabilities	1,496	(2,434)
Other liabilities	(505)	(492)
Net cash provided by operating activities	4,356	5,967
Cash flows from investing activities
Purchases of property and equipment	(6,905)	(6,812)
Purchases of short-term investments	(9,384)	(16,885)
Proceeds from sales of short-term investments	290	100
Proceeds from maturities of short-term investments	1,723	1,025
Net cash used in investing activities	(14,276)	(22,572)
Cash flows from financing activities
Proceeds from exercise of stock options	327	350
Excess tax benefits from stock-based compensation		709
Net cash provided by financing activities	327	1,059
Net decrease in cash and cash equivalents	(9,593)	(15,546)
Cash and cash equivalents
Beginning of year	41,136	41,993
End of period	31,543	26,447
Noncash investing activities
Property and equipment acquired	$ 555	$ 0