Note 3 - Accounts Receivable

12 Months Ended

Dec. 31, 2020

Notes to Financial Statements

Loans, Notes, Trade and Other Receivables Disclosure [Text Block]

3.

   

ACCOUNTS RECEIVABLE

The Company establishes an allowance for doubtful accounts based upon factors surrounding the credit risk of specific customers, historical trends and other information. The reserve for doubtful accounts was

$19,973

and

$18,325

at

December 31, 2020

and

2019,

respectively.