Annual report pursuant to Section 13 and 15(d)

Note 6 - Leases (Details Textual)

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Note 6 - Leases (Details Textual)
$ in Millions
 12 Months Ended
Dec. 31, 2020
USD ($)
ft²
Dec. 31, 2019
USD ($)
Jun. 30, 2020
Operating Lease, Payments | $ $ 1.6 $ 2.0  
HONG KONG      
Area of Land (Square Foot) 7,300    
Rolling Hills Estates [Member]      
Area of Land (Square Foot) 4,900    
Lessee, Operating Lease, Renewal Term (Year)     5 years
Richmond, British Columbia [Member]      
Area of Land (Square Foot) 1,600    
Metuchen, New Jersey [Member]      
Area of Land (Square Foot) 2,000    
CHINA      
Lessee, Number of Branches 8