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Note 3 - Concentration of Credit Risk
 3 Months Ended
Mar. 31, 2021
Notes to Financial Statements  
Concentration Risk Disclosure [Text Block]
NOTE
3:
         CONCENTRATION OF CREDIT RISK
 
Cash and cash equivalents
 
The Company had cash and cash equivalents of
$5.9
million and
$7.7
million at
March 31, 2021
and
December 31, 2020,
respectively. The Company invests excess cash in U.S. treasury bills, certificates of deposit or money market accounts, all with original maturities of less than
three
months. Cash equivalents were
$1.0
million at
March 31, 2021
and
December 31, 2020,
respectively.
 
The Company places most of its temporary cash investments with financial institutions, which from time to time
may
exceed the Federal Deposit Insurance Corporation limit. The amount at risk at
March 31, 2021
and
December 31, 2020
was
$3,677,000
and
$5,822,000,
respectively.
 
Sales concentration
 
Revenue from a single customer in any
one
period can exceed
10%
of our total revenues. During the
three
months ended
March 31, 2021,
one
customer exceeded
10%,
and represented
30.7%
of revenues. During the
three
months ended
March 31, 2020,
three
customers exceeded
10%,
and represented
27.1%,
21.5%
and
19.3%
of revenues, respectively.
 
Accounts receivable
 
The Company sells products and services to various companies across several industries in the ordinary course of business. The Company performs ongoing credit evaluations to assess the probability of accounts receivable collection based on a number of factors, including past transaction experience, evaluation of their credit history and review of the invoicing terms of the contract to determine the financial strength of its customers. The Company also maintains allowances for anticipated losses. At
March 31, 2021,
two
customers exceeded
10%
of the accounts receivable balance, representing
25.1%
in total, and at
December 31, 2020
two
customers represented
35.0%
of the accounts receivable balance.