Note 4 - Accounts Receivable (Tables)

3 Months Ended

Mar. 31, 2020

Notes Tables

Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]

	March 31, 2020			December 31, 2019
Accounts receivable	$	2,134,389		$	2,446,486
Expected credit losses		(52,912	)		(53,708	)
Net accounts receivable	$	2,081,477		$	2,392,778