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Note F - Concentration of Risk
 12 Months Ended
Dec. 31, 2020
Notes to Financial Statements  
Concentration Risk Disclosure [Text Block]
NOTE F
—
CONCENTRATION OF RISK
 
Financial instruments which potentially subject the Company to risk primarily consist of cash, and cash equivalents, investment in debt security, and accounts receivables.
 
The Company maintains its cash and cash equivalents with various financial institutions, which, at times
may
exceed insured limits. The exposure to the Company is solely dependent upon daily bank balances and the respective strength of the financial institutions. The Company was in excess of coverage of approximately
$16,020,000
and
$0
at
December 31, 2020
and
2019,
respectively. The Company has
not
incurred any losses on these accounts.
 
The Company extends credit to customers on an unsecured basis in the normal course of business. The Company's policy is to perform an analysis of the recoverability of its receivables at the end of each reporting period and to establish allowances where appropriate. The Company analyzes historical bad debts and contract losses, customer concentrations, and customer credit-worthiness when evaluating the adequacy of the allowances.
 
During the year ended
December 31, 2020, 
one
 customer accounted for 
18%
of total revenue. During the year ended
December 31, 2019, 
two
 customers accounted for 
22%
and
14%
of total revenue, respectively.
 
One
customer accounted for 
31%
of total accounts receivable, as of
December 31, 2020.
Three
customers accounted for 
18%,
16%
and
14%
of total accounts receivable, respectively, as of
December 31, 2019.