Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2016	Jan. 03, 2015	Dec. 28, 2013
Operating activities:
Net income	$ 474	$ 10,038	$ 2,231
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Depreciation and amortization	522	420	490
Change in fair value of earn-out liability	5	1,258	355
Stock-based compensation cost recognized	895	972	689
Deferred income taxes	(209)	(8,776)
Excess tax benefits from stock-based awards		(36)
Provision for doubtful accounts	62	86	61
Changes in operating assets and liabilities:
Accounts receivable	(1,007)	(1,078)	(1,926)
Inventories	(1,987)	1,486	(2,514)
Prepaid expenses and other current assets	124	66	553
Other long-term assets	57	82	(16)
Accounts payable	465	(520)	173
Accrued compensation	(291)	(28)	328
Accrued expenses	(36)	17	171
Accrued warranty	134	1	15
Deferred revenue	132	46	129
Other long-term liabilities	67	(20)	28
Net cash (used in) provided by operating activities	(593)	4,014	767
Investing activities:
Acquisition of property and equipment	(875)	(568)	(380)
Payment on earn-out liability	(423)	(459)	(383)
Net cash used in investing activities	(1,298)	(1,027)	(763)
Cash flows from financing activities:
Proceeds from stock option exercises	1,027	1,501	1,495
Excess tax benefits from stock-based awards	0	36	0
Taxes paid related to net share settlements of equity awards	(606)
Repurchase of employee share awards	(275)
Repurchase of common stock	(1,563)	(4,665)	(426)
Payment of legal costs in connection with tender offer			(40)
Net cash (used in) provided by financing activities	(1,417)	(3,128)	1,029
Net cash provided by investing activities from discontinued operations			510
Net cash provided by discontinued operations			510
Net (decrease) increase in cash and cash equivalents	(3,308)	(141)	1,543
Cash and cash equivalents, beginning of year	13,303	13,444	11,901
Cash and cash equivalents, end of year	9,995	13,303	13,444
Cash paid (received) during the year for:
Income taxes	$ 27	$ 35	(536)
Supplemental disclosure of non-cash activities:
Conversion of preferred stock to common stock			$ 5