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Note 15 - Concentrations of Credit Risk
6 Months Ended
Jun. 30, 2019
Notes to Financial Statements  
Concentration Credit Risk [Text Block]
15.
  Concentrations of Credit Risk:
 
Financial instruments that potentially subject the Company to concentrations of credit risk consist primarily of cash and accounts receivable.  The Company places its cash with high quality financial institutions and limits the amount of credit exposure with any
one
institution.
 
The Company currently maintains a substantial portion of its day-to-day operating cash balances at financial institutions. At
June 30, 2019,
the Company had total cash balances of
$1,049,044
(
December 31, 2018 -
$641,536
) at financial institutions, where
$776,763
(
December 31, 2018 -
$489,235
) is in excess of federally insured limits.
 
The Company has concentrations of credit risk with respect to accounts receivable, the majority of its accounts receivable are concentrated geographically in the United States amongst a small number of customers.
 
As of
June 30, 2019,
the Company had
one
customer, totaling
$1,272,099
who accounted for greater than
10%
of the total accounts receivable. As of
December 31, 2018,
the Company had
three
customers, totaling
$8,814
who accounted for greater than
10%
of the total accounts receivable.
 
The Company controls credit risk through monitoring procedures and receiving prepayments of cash for services rendered.  The Company performs credit evaluations of its customers but generally does
not
require collateral to secure accounts receivable.