Note 4 - Accounts Receivable (Tables)

9 Months Ended

Sep. 30, 2019

Notes Tables

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

	September 30, 2019			December 31, 2018
Accounts receivable	$	1,962,828		$	39,769
Provision for doubtful accounts		(53,513	)		(27,666	)
Net accounts receivable	$	1,909,315			12,103