Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019
Operating activities:
Net loss	$ (6,329)	$ (8,813)
Adjustments to reconcile net loss to net cash used in operating activities:
Loss on disposal of property and equipment	17	2
Depreciation and amortization	504	688
Change in fair value of earn-out liability		47
Stock-based compensation	1,119	1,703
Provision for doubtful accounts	181	25
Changes in operating assets and liabilities:
Accounts receivable	1,861	(271)
Inventories	2,382	545
Prepaid expenses and other current assets	(328)	145
Operating lease right-of-use assets	1,342	1,219
Other long-term assets	27	47
Accounts payable	(1,445)	76
Accrued compensation	(434)	(563)
Accrued expenses	259	(752)
Accrued warranty	(289)	(324)
Deferred revenue	(583)	(415)
Operating lease liabilities	(1,524)	(1,274)
Other long-term liabilities	3	2
Net cash used in operating activities	(3,237)	(7,913)
Investing activities:
Acquisition of property and equipment	(97)	(128)
Proceeds from sale of property and equipment	4
Payment on earn-out liability		(381)
Net cash used in investing activities	(93)	(509)
Financing activities:
Proceeds from PPP loan	2,497
Taxes paid related to net share settlements of equity awards	(30)	(156)
Net cash provided by (used in) financing activities	2,467	(156)
Effect of foreign exchange rate changes	(164)	37
Net decrease in cash and cash equivalents	(1,027)	(8,541)
Cash and cash equivalents, beginning of year	12,653	21,194
Cash and cash equivalents, end of year	11,626	12,653
Supplemental disclosure of cash flow information:
Cash (received) paid during the period for income taxes	(74)	14
Supplemental disclosure of non-cash activities:
Transfer of inventory to property and equipment	$ 129	$ 67