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Note 8 - Leases (Details Textual)
12 Months Ended
Jan. 02, 2022
USD ($)
ft²
Jan. 03, 2021
USD ($)
Dec. 29, 2019
USD ($)
Jun. 30, 2021
ft²
Apr. 30, 2019
ft²
Mar. 31, 2019
USD ($)
Feb. 13, 2019
ft²
Operating and Finance Lease, Right of Use Asset $ 1,529,000 $ 1,839,000       $ 975,000  
Operating and Finance Lease Liability 1,563,000 1,882,000       $ 939,000  
Finance Lease, Liability, Payment, Due, Total 722,000            
Operating Lease, Expense 425,000 $ 493,000 $ 798,000        
Office In California [Member]              
Lessee, Operating Lease, Term of Contract (Year)             5 years
Area of Real Estate Property (Square Foot) | ft²             24,164
Beaverton Oregon [Member]              
Area of Real Estate Property (Square Foot) | ft²         705    
Office in India [Member]              
Area of Real Estate Property (Square Foot) | ft²       9,400      
Finance Lease, Liability, Payment, Due, Total $ 196,000            
Office Premises in India [Member]              
Lessee, Operating Lease, Term of Contract (Year) 11 months            
Area of Real Estate Property (Square Foot) | ft² 1,100            
Minimum [Member]              
Lessee, Operating Lease, Term of Contract (Year) 1 year            
Lessee, Finance Lease, Term of Contract (Year) 2 years            
Maximum [Member]              
Lessee, Operating Lease, Term of Contract (Year) 5 years            
Lessee, Finance Lease, Term of Contract (Year) 3 years