Note 3 - Liquidity and Going Concern (Details Textual) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net Income (Loss) Attributable to Parent, Total	$ (1,941,584)	$ (559,297)	$ (5,680,152)	$ (772,100)	$ (3,600,000)	$ (1,600,000)	$ 700,000
Failure to Pay Contractually Obligations [Member]
Loss Contingency, Damages Sought, Value			$ 700,000