Quarterly report pursuant to Section 13 or 15(d)

Note 5 - Leases (Details Textual)

v3.20.2
Note 5 - Leases (Details Textual)
 3 Months Ended 6 Months Ended
Jul. 01, 2020
USD ($)
Jun. 30, 2020
USD ($)
a
ft²
Jun. 30, 2019
USD ($)
Jun. 30, 2020
USD ($)
a
ft²
Jun. 30, 2019
USD ($)
Operating Lease, Payments | $   $ 421,000 $ 577,000 $ 900,000 $ 1,100,000
HONG KONG          
Area of Land (Acre) | a   9,600   9,600  
HONG KONG | Subsequent Event [Member]          
Percent of Increase in Monthly Lease Cost Savings 10.00%        
Operating Lease Liability, Increase From Modification | $ $ 831,000        
Rolling Hills Estates [Member]          
Area of Land (Acre)   4,900   4,900  
Lessee, Operating Lease, Renewal Term (Year)   5 years   5 years  
Monterey Park, California [Member]          
Area of Land (Acre)   2,400   2,400  
Richmond, British Columbia [Member]          
Area of Land (Acre)   1,600   1,600  
Metuchen, New Jersey [Member]          
Area of Land (Acre)   2,000   2,000  
CHINA          
Lessee, Number of Branches   8   8