XML 51 R41.htm IDEA: XBRL DOCUMENT v3.21.1
Note 8 - Geographic Segment Data - Assets by geographic Areas (Details) - USD ($)
Mar. 31, 2021
Dec. 31, 2020
Assets $ 23,547,208 $ 21,550,971
Assets Held for Sale International Subsidiaries 205,000 294,000
UNITED STATES    
Assets 15,836,000 12,459,000
MEXICO    
Assets $ 7,506,000 $ 8,798,000