Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2017	Dec. 30, 2016	Dec. 25, 2015
Cash flows from operating activities:
Net income (loss)	$ 75,085	$ 10,051	$ (10,732)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	5,275	5,981	4,728
Amortization of finite-lived intangibles	5,437	5,758	6,212
Amortization of debt issuance costs	153	153	829
Excess tax benefit from stock-based compensation		771	77
Stock-based compensation	7,757	5,671	3,660
Loss from disposal of fixed assets	72	169
Change in the fair value of the contingent earn out	(278)	1,446	(449)
Changes in assets and liabilities, net of effects of acquisitions:
Accounts receivable	(14,930)	(15,834)	5,818
Inventories	(131,874)	(31,516)	(8,329)
Prepaid expenses and other	(4,911)	1,709	(948)
Deferred income taxes	(3,755)	3,534	10,352
Other non-current assets	(582)	(45)	(24)
Accounts payable	99,569	31,705	(12,593)
Accrued compensation and related benefits	2,777	1,397	798
Income taxes payable	8,177	(16)	(77)
Other liabilities	933	(3,357)	1,604
Net cash provided by operating activities	48,905	17,577	926
Cash flows from investing activities:
Purchases of equipment and leasehold improvements	(16,149)	(7,278)	(10,152)
Acquisition of businesses, net of cash acquired			(45,064)
Net cash used in investing activities	(16,149)	(7,278)	(55,216)
Cash flows from financing activities:
Proceeds from bank borrowings	15,076	6,657	79,212
Proceeds from issuance of common stock	1,816	602	2,411
Principal payments on bank borrowings	(31,248)	(14,341)	(55,205)
Payments of debt issuance costs			(611)
Excess tax benefit from stock-based compensation			(77)
Employees’ taxes paid upon vesting of restricted stock units	(2,714)	(771)	(331)
Net cash used in financing activities	(17,070)	(7,853)	25,399
Effect of exchange rate changes on cash and cash equivalents	155	(84)	(3)
Net increase (decrease) in cash	15,841	2,362	(28,894)
Cash and cash equivalents at beginning of year	52,465	50,103	78,997
Cash and cash equivalents at end of year	68,306	52,465	50,103
Supplemental cash flow information:
Income taxes paid	7,614	4,463	2,900
Income tax refunds	71	646	622
Interest paid	2,216	2,505	2,163
Non-cash investing and financing activities:
Fair value of common shares issued for acquisition			17,661
Fair value of earn-out payments related to Miconex acquisition			1,280
Restricted stock issued	13,080	2,986	2,950
Equipment and leasehold improvements purchased included in accounts payable and other current liabilities	$ 2,558	$ 701	$ 153