Note 4 - Receivables (Tables)

9 Months Ended

Sep. 30, 2018

Notes Tables

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

	September 30, 2018			December 31, 2017
Trade receivables	$	61,528		$	64,387
Other receivables		195,000			355,839
		256,528			420,226
Less allowance for doubtful accounts		(1,975	)		(305,895	)
Accounts and other receivables, net	$	254,553		$	114,331