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Note 16 - Major Customers and Accounts Receivable
6 Months Ended
Jun. 30, 2019
Notes to Financial Statements  
Concentration Risk Disclosure [Text Block]
16.
MAJOR CUSTOMERS AND ACCOUNTS RECEIVABLE
 
For the
three
months ended
June 30, 2019
and
2018,
two
customers accounted for
59%
and 
34%
of revenue, respectively. For the
six
months ended
June 30, 2019
and
2018,
three
customers accounted for
58%
and
two
customers accounted for
37%
of revenue, respectively.
 
Two customers accounted for
90%
of current accounts receivable as of
June 30, 2019.
At
December 31, 2018,
one
customer accounted for
70%
of current accounts receivable. One customer accounted for
100%
of non-current accounts receivable as of
June 30, 2019
and
December 31, 2018,
the full amount of which has been  reserved for.