UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 28, 2020	Jun. 30, 2019
Cash flows from operating activities:
Net loss	$ (6,144)	$ (8,110)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	490	592
Stock-based compensation	343	1,742
Write-down of inventories	43	88
Write-off of equipment	4	2
Tax benefit from acquisition		(282)
Changes in operating assets and liabilities:
Accounts receivable	867	690
Inventories	165	247
Other assets	425	(150)
Trade payables	574	77
Accrued liabilities and deferred revenue	(345)	(850)
Other long-term liabilities		(16)
Net cash used in operating activities	(3,578)	(5,970)
Cash flows from investing activities:
Capital expenditures for property and equipment	(40)	(523)
Capitalized internal-use software	(396)
Cash received from business acquisition		20
Net cash used in investing activities	(436)	(503)
Cash flows from financing activities:
Payment of finance lease obligations	(120)	(194)
Proceeds from paycheck protection program loan	1,191
Proceeds from line of credit	27,000	20,000
Repayment of line of credit	(27,000)	(20,000)
Proceeds from issuance of common stock, net of issuance costs	7,847	8,548
Taxes paid related to net settlement of equity awards	(54)	(193)
Net cash provided by financing activities	8,864	8,161
Net increase in cash, cash equivalents and restricted cash	4,850	1,688
Cash, cash equivalents and restricted cash at beginning of period	21,548	26,463
Cash, cash equivalents and restricted cash at end of period	$ 26,398	$ 28,151