Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jul. 02, 2016		Jul. 04, 2015
Operating activities:
Net loss	$ (227)		$ (406)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	291		252
Change in fair value of earn-out liability	33		32
Stock-based compensation	800		562
Provision for doubtful accounts	41
Changes in operating assets and liabilities:
Accounts receivable	791		1,018
Inventories	(1,035)		(1,052)
Prepaid expenses and other current assets	(174)		(105)
Other long-term assets	57		26
Accounts payable	971		302
Accrued compensation	178		(393)
Accrued expenses	121		52
Accrued warranty	7		51
Deferred revenue	(40)		20
Other long-term liabilities	14		26
Net cash provided by operating activities	1,828		385
Investing activities:
Acquisition of property and equipment	(367)		(588)
Payment on earn-out liability	(190)		(236)
Net cash used in investing activities	(557)		(824)
Financing activities:
Proceeds from stock option exercises	413		614
Repurchase of common stock	(59)		(670)
Taxes paid related to net share settlements of equity awards	(99)		(605)
Net cash provided by (used in) financing activities	255		(661)
Net increase (decrease) in cash and cash equivalents	1,526		(1,100)
Cash and cash equivalents, beginning of period	9,995	[1]	13,303
Cash and cash equivalents, end of period	11,521		12,203
Cash paid during the period for:
Income taxes	$ 35		$ 32

[1] Derived from the audited consolidated financial statements included in the Annual Report on Form 10-K filed with the SEC for the year ended January 2, 2016.