Note 6 - Notes Payable (Tables)

3 Months Ended

Mar. 31, 2020

Notes Tables

Schedule of Short-term Debt [Table Text Block]

	Due Date	March 31, 2020		December 31, 2019
Bridge loan	June 28, 2020	$	1,721,776	$	1,989,104
Promissory note 2019	June 27, 2020		980,833		680,833
Promissory note 2020 T1	August 5, 2020		490,000		-
Promissory note 2020 T2	September 5, 2020		480,000		-
Short term borrowing	May 26, 2020		-		18,563
Short term borrowing	June 10, 2020		-		147,783
Short term borrowing	June 20, 2020		-		194,943
Short term borrowing	August 12, 2020		196,478		-
Short term borrowing	August 25, 2020		215,526		-
Short term borrowing	September 11, 2020		226,053		-
Dr. Schwartz notes	September 30, 2020		2,115,000		2,115,000
Total Notes Payable, gross			6,425,666		5,146,226
Less: Unamortized discount			493,490		350,426
Total Notes Payable, net		$	5,932,176	$	4,795,800

Schedule of Derivative Liabilities at Fair Value [Table Text Block]

Derivative liability balance at December 31, 2019	$	50,989
Derivative instrument recognized for A, B and Agent Warrants		2,669,995
Derivative instrument related to Promissory Note 2020		120,921
Gain recognized to revalue derivative instrument at fair value		(27,107)
Derivative liability balance at March 31, 2020	$	2,814,798