Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Jan. 02, 2022	Jan. 03, 2021	Dec. 29, 2019
Cash flows from operating activities:
Net loss	$ (6,616,000)	$ (11,151,000)	$ (15,444,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	626,000	817,000	1,201,000
Stock-based compensation	2,526,000	1,739,000	3,144,000
Write-down of inventories	225,000	199,000	94,000
Gain on forgiveness of PPP Loan	(1,192,000)	0	0
Loss (gain) on disposal of equipment	(5,000)	44,000	4,000
Tax benefit from acquisition	0	0	(185,000)
Bad debt expense	62,000	0	0
Changes in operating assets and liabilities:
Accounts receivable	332,000	303,000	218,000
Inventories	385,000	373,000	483,000
Other assets	(444,000)	533,000	229,000
Trade payables	367,000	298,000	(456,000)
Accrued liabilities	325,000	207,000	(1,024,000)
Deferred income	403,000	(106,000)	158,000
Other long-term liabilities	147,000	0	(16,000)
Net cash used in operating activities	(2,859,000)	(6,744,000)	(11,594,000)
Cash flows from investing activities:
Capital expenditures for property and equipment	(185,000)	(253,000)	(576,000)
Capitalized internal-use software	(533,000)	(801,000)	(365,000)
Cash received from business acquisition	0	0	20,000
Net cash used in investing activities	(718,000)	(1,054,000)	(921,000)
Cash flows from financing activities:
Payment of finance lease obligations	(378,000)	(270,000)	(365,000)
Proceeds from PPP loan	0	1,191,000	0
Proceeds from line of credit	60,000,000	57,000,000	46,000,000
Repayment of line of credit	(60,000,000)	(57,000,000)	(46,000,000)
Proceeds from issuance of common stock	1,342,000	9,296,000	9,437,000
Stock issuance costs	(45,000)	(1,147,000)	(1,181,000)
Taxes paid related to net settlement of equity awards	(485,000)	(72,000)	(291,000)
Net cash provided by financing activities	434,000	8,998,000	7,600,000
Net (decrease) increase in cash, cash equivalents and restricted cash	(3,143,000)	1,200,000	(4,915,000)
Cash, cash equivalents and restricted cash at the beginning of the period	22,748,000	21,548,000	26,463,000
Cash, cash equivalents, and restricted cash at the end of the period	19,605,000	22,748,000	21,548,000
Supplemental disclosures of cash flow information:
Interest paid	77,000	277,000	300,000
Income taxes paid	73,000	24,000	126,000
Supplemental schedule of non-cash investing and financing activities:
Fair value of common stock issued as consideration for business acquisition	0	0	903,000
Finance lease obligation to finance capital expenditures	$ 690,000	$ 670,000	$ 471,000