Note 12 - Concentrations

12 Months Ended

Dec. 31, 2020

Notes to Financial Statements

Concentration Risk Disclosure [Text Block]

( 12 ) Concentrations

Most of the Company's customers are located in the United States. Two customers accounted for approximately

70%

and

16%

of total revenues in

2020.

Two customers accounted for approximately

43%

and

25%

of total revenues in

2019.

Three customers accounted for approximately

22%,

18%

and

11%

of accounts receivable on

December 31, 2020.

One customer accounted for

15%

of accounts receivable on

December 31, 2019.