Note 1 - Summary of Significant Accounting Policies (Details Textual) $ in Thousands	12 Months Ended
Dec. 31, 2022 USD ($)	Jan. 01, 2022 USD ($)	Jan. 02, 2021 USD ($)
Cash and Cash Equivalents, at Carrying Value, Total	$ 339	$ 235	$ 734
Property, Plant and Equipment, Useful Life (Year)	5 years
Number of Reporting Units		3
Goodwill, Impairment Loss	$ 0	$ 0	0
Capitalized Computer Software, Additions	282	1,256	305
Capitalized Computer Software, Net, Ending Balance	977	1,350	1,389
Deferred Tax Assets, Valuation Allowance, Total		0
Revenue from Contract with Customer, Including Assessed Tax	284,680	203,875	150,409
Contract with Customer, Liability, Total	1,100	3,400	400
Contract with Customer, Liability, Revenue Recognized	3,400	400	400
Advertising Expense	$ 925	$ 914	$ 800
Revenue, Segment Benchmark [Member] \| Customer Concentration Risk [Member] \| Two Customers [Member]
Number of Customers	2
Revenue, Segment Benchmark [Member] \| Customer Concentration Risk [Member] \| Customer 1 [Member]
Concentration Risk, Percentage	13.20%
Revenue, Segment Benchmark [Member] \| Customer Concentration Risk [Member] \| Customer 2 [Member]
Concentration Risk, Percentage	12.70%
Revenue, Segment Benchmark [Member] \| Customer Concentration Risk [Member] \| One Customer [Member]
Number of Customers		1
Concentration Risk, Percentage		10.60%
Revenue, Segment Benchmark [Member] \| Customer Concentration Risk [Member] \| Ten Largest Customers [Member]
Number of Customers	10
Concentration Risk, Percentage	53.70%
Revenue, Segment Benchmark [Member] \| Customer Concentration Risk [Member] \| Twenty Largest Customers [Member]
Number of Customers	20
Concentration Risk, Percentage	67.00%
Revenue, Segment Benchmark [Member] \| Customer Concentration Risk [Member] \| Five Largest Customers [Member]
Number of Customers	5	5	5
Concentration Risk, Percentage	43.00%
Revenue Benchmark [Member] \| Customer Concentration Risk [Member] \| Ten Largest Customers [Member]
Number of Customers		10	10
Concentration Risk, Percentage		52.50%	46.60%
Revenue Benchmark [Member] \| Customer Concentration Risk [Member] \| Twenty Largest Customers [Member]
Number of Customers		20	20
Concentration Risk, Percentage		65.10%	60.70%
Revenue Benchmark [Member] \| Customer Concentration Risk [Member] \| Five Largest Customers [Member]
Concentration Risk, Percentage		35.80%	33.40%
Accounts Receivable [Member] \| Customer Concentration Risk [Member] \| Two Customers [Member]
Number of Customers	2	2	2
Accounts Receivable [Member] \| Customer Concentration Risk [Member] \| Customer 1 [Member]
Concentration Risk, Percentage	16.10%	15.30%	11.80%
Accounts Receivable [Member] \| Customer Concentration Risk [Member] \| Customer 2 [Member]
Concentration Risk, Percentage	12.50%	14.20%	10.60%
Transit Accounts Payable [Member]
Accounts Payable, Current, Total	$ 9,800	$ 2,100	$ 4,900
Accounts Payable, Net	6,500	1,100	2,400
Transit Accounts Receivable [Member]
Accounts Receivable, before Allowance for Credit Loss, Current	3,300	1,000	2,500
Service, Other [Member]
Revenue from Contract with Customer, Including Assessed Tax	2,200	$ 1,800	1,500
Restricted Covenants [Member]
Finite-Lived Intangible Asset, Useful Life (Year)		4 years
Customer Relationships [Member]
Finite-Lived Intangible Asset, Useful Life (Year)		6 years
CANADA
Cash and Cash Equivalents, at Carrying Value, Total	79	$ 21	42
Revenue from Contract with Customer, Including Assessed Tax	4,708	9,578	15,310
SERBIA
Cash and Cash Equivalents, at Carrying Value, Total	203	169	246
Revenue from Contract with Customer, Including Assessed Tax	2,630	2,891	3,159
NETHERLANDS
Cash and Cash Equivalents, at Carrying Value, Total	$ 16	$ 2	$ 6

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