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Note 19 - Major Customers and Accounts Receivables
3 Months Ended
Mar. 31, 2021
Notes to Financial Statements  
Concentration Risk Disclosure [Text Block]
19.
MAJOR CUSTOMERS AND ACCOUNTS RECEIVABLES
 
For the
three
months ended
March 31, 2021
and
2020,
two
customers accounted for
52%
of revenues and
three
customers accounted for
71%
of revenues, respectively.
Two
customers accounted for
68%
of current accounts receivable as of
March 31, 2021.
At
December 31, 2020,
one
customer accounted for 
31%
of current accounts receivable.