Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2023	Mar. 26, 2022
Cash Flows from Operating Activities:
Net loss	$ (6,329)	$ (3,620)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	153	201
Share-based compensation expense	50	56
Changes in current assets and liabilities:
Trade accounts receivable	209	1,004
Contract assets	(878)	1,016
Other current assets	888	1,415
Accounts payable	1,858	(427)
Accrued compensation and benefits	1,076	(483)
Contract liabilities	(53)	(423)
Income taxes payable	22	77
Other current liabilities, net	(125)	(211)
Net cash used in operating activities	(3,129)	(1,395)
Cash Flows from Investing Activities:
Property and equipment acquired	(108)	(23)
Net cash used in investing activities	(108)	(23)
Cash Flows from Financing Activities:
Common stock and warrants issued, net	2,974	0
At-the-market offering costs	0	(52)
Payments on finance leases	(70)	(134)
Proceeds (payments) from revolving credit facility, net	(769)	100
Net cash provided by (used in) financing activities	2,135	(86)
Net change in cash	(1,102)	(1,504)
Cash at beginning of period	3,464	19,202
Cash at end of period	2,362	17,698
Supplemental disclosure of cash flow information:
Cash paid during the period for interest	66	51
Fair value of warrants at issuance date	2,782	0
Right of use assets obtained in exchange for new operating lease liability	0	354
Right of use assets obtained in exchange for new financing lease liability	$ 289	$ 0