Note 1 - Summary of Significant Accounting Policies (Details Textual) $ in Thousands	12 Months Ended
	Jan. 01, 2022 USD ($)	Jan. 02, 2021 USD ($)
Cash and Cash Equivalents, at Carrying Value, Ending Balance	$ 235	$ 734
Annual Depreciation Rate	20.00%
Number of Reporting Units	3
Goodwill, Impairment Loss	$ 0	0
Capitalized Computer Software, Additions	1,256	305
Capitalized Computer Software, Net, Ending Balance	1,350	1,389
Deferred Tax Assets, Valuation Allowance, Total	0	0
Revenue from Contract with Customer, Including Assessed Tax	203,875	150,409
Contract with Customer, Liability, Total	3,400	400
Contract with Customer, Liability, Revenue Recognized	400	400
Advertising Expense	$ 914	$ 800
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Ginkgo Bioworks [Member]
Concentration Risk, Percentage	15.30%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Hawaii Department of Education [Member]
Concentration Risk, Percentage	14.20%	10.60%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | New York City Board of Education [Member]
Concentration Risk, Percentage		11.80%
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Five Largest Customers [Member]
Concentration Risk, Percentage	35.80%	33.40%
Number of Customers	5	5
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Ten Largest Customers [Member]
Concentration Risk, Percentage	52.50%	46.60%
Number of Customers	10	10
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Twenty Largest Customers [Member]
Concentration Risk, Percentage	65.10%	60.70%
Number of Customers	20	20
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | New York City Board of Education [Member]
Concentration Risk, Percentage		10.60%
Transit Accounts Payable [Member]
Accounts Payable, Current, Total	$ 2,100	$ 4,900
Accounts Payable, Net	1,100	2,400
Transit Accounts Receivable [Member]
Accounts Receivable, before Allowance for Credit Loss, Current	1,000	2,500
Service, Other [Member]
Revenue from Contract with Customer, Including Assessed Tax	$ 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, Ending Balance	$ 21	42
Revenue from Contract with Customer, Including Assessed Tax	9,578	15,310
SERBIA
Cash and Cash Equivalents, at Carrying Value, Ending Balance	169	246
Revenue from Contract with Customer, Including Assessed Tax	$ 2,891	$ 3,159