Note 3 - Liquidity and Going Concern (Details Textual) - USD ($)		1 Months Ended			4 Months Ended	12 Months Ended
	Nov. 15, 2018	Apr. 30, 2020	Feb. 29, 2020	Jan. 31, 2020	May 14, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Stock Issued During Period, Value, New Issues						$ 303,000
Net Income (Loss) Attributable to Parent, Total						$ (7,127,355)	$ (3,585,709)	$ (1,600,000)
Equity Financing Arrangement [Member] | Forecast [Member]
Restricted Cash, Total		$ 500,000
Subsequent Event [Member] | Equity Financing Arrangement [Member] | Convertible Preferred Stock [Member]
Value of Shares Issuable to Other Investor				$ 2,000,000
LF International Pte [Member] | Equity Financing Arrangement [Member] | Forecast [Member]
Proceeds from Issuance of Convertible Preferred Stock		$ 1,300,000
LF International Pte [Member] | Equity Financing Arrangement [Member] | Common Stock [Member] | Forecast [Member]
Stock Issued During Period, Shares, New Issues (in shares)		260,000
LF International Pte [Member] | Subsequent Event [Member] | Equity Financing Arrangement [Member]
Preferred Stock, Convertible, Conversion Price (in dollars per share)				$ 1
Proceeds from Issuance of Convertible Preferred Stock			$ 700,000	$ 2,500,000
LF International Pte [Member] | Subsequent Event [Member] | Equity Financing Arrangement [Member] | Common Stock [Member]
Stock Issued During Period, Shares, New Issues (in shares)			140,000
LF International Pte [Member] | Subsequent Event [Member] | Equity Financing Arrangement [Member] | Convertible Preferred Stock [Member]
Stock Issued During Period, Value, New Issues				$ 5,000,000
Other Investor [Member] | Equity Financing Arrangement [Member] | Convertible Preferred Stock [Member] | Forecast [Member]
Stock Issued During Period, Value, New Issues					$ 1,000,000
PNC [Member] | PNC Agreements, Amendment Two [Member]
Debt Instrument, Covenant, Required Proceeds from Equity Issuance	$ 7,500,000