Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jul. 01, 2017		Jul. 02, 2016
Operating activities:
Net loss	$ (4,616)		$ (227)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation and amortization	417		291
Change in fair value of earn-out liability	61		33
Stock-based compensation	836		800
Provision for doubtful accounts	10		41
Changes in operating assets and liabilities:
Accounts receivable	2,966		791
Inventories	255		(1,035)
Prepaid expenses and other current assets	(38)		(174)
Other long-term assets	31		57
Accounts payable	(214)		971
Accrued compensation	(188)		178
Accrued expenses	(325)		121
Accrued warranty	63		7
Deferred revenue	(38)		(40)
Other long-term liabilities	31		14
Net cash (used in) provided by operating activities	(749)		1,828
Investing activities:
Acquisition of property and equipment	(436)		(367)
Payment on earn-out liability	(178)		(190)
Net cash used in investing activities	(614)		(557)
Financing activities:
Proceeds from issuance of common stock, net of issuance costs	2,263
Proceeds from stock option exercises	215		413
Taxes paid related to net share settlements of equity awards	(268)		(99)
Repurchase of common stock			(59)
Net cash provided by financing activities	2,210		255
Net increase in cash and cash equivalents	847		1,526
Cash and cash equivalents, beginning of period	23,747	[1]	9,995
Cash and cash equivalents, end of period	24,594		11,521
Cash paid during the period for:
Income taxes	$ 15		$ 35

[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 December 31, 2016.