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Note 3 - Liquidity and Going Concern (Details Textual) - USD ($)		1 Months Ended			12 Months Ended		16 Months Ended
	Nov. 15, 2018	Apr. 30, 2020	Feb. 29, 2020	Jan. 31, 2020	Dec. 31, 2020	Dec. 31, 2019	Apr. 15, 2021
Cumulative Net Loss					$ (14,000,000)
Stock Issued During Period, Value, New Issues					5,426,601	$ 303,000
Proceeds from Issuance of Convertible Preferred Stock					$ 1,500,000
Equity Financing Arrangement [Member]
Restricted Cash, Total		$ 500,000
Equity Financing Arrangement [Member] | Common Stock [Member]
Stock Issued During Period, Shares, New Issues (in shares)					400,000
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]
Preferred Stock, Convertible, Conversion Price (in dollars per share)				$ 1
Proceeds from Issuance of Convertible Preferred Stock		$ 1,300,000	$ 700,000	$ 2,500,000
LF International Pte [Member] | Equity Financing Arrangement [Member] | Common Stock [Member]
Stock Issued During Period, Shares, New Issues (in shares)		260,000	140,000
LF International Pte [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]
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

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