Note 6 - Notes Payable (Details Textual)							1 Months Ended				2 Months Ended			3 Months Ended		7 Months Ended
	Apr. 05, 2020 USD ($) shares	Mar. 19, 2020 USD ($) shares	Mar. 05, 2020 USD ($) shares	Feb. 05, 2020 USD ($) $ / shares shares	Sep. 27, 2019	Sep. 28, 2018 USD ($) $ / shares shares	Jan. 31, 2020 USD ($) shares	Sep. 30, 2019 USD ($) $ / shares shares	Feb. 27, 2019 USD ($) shares	Nov. 30, 2018 USD ($)	Apr. 05, 2020 USD ($) shares	Mar. 03, 2020 USD ($)	Mar. 03, 2019 USD ($)	Mar. 31, 2020 USD ($) shares	Mar. 31, 2019 USD ($) shares	Jul. 15, 2019 USD ($) $ / shares shares	Apr. 21, 2020 USD ($)	Mar. 18, 2020 USD ($)	Dec. 31, 2019 USD ($)	May 21, 2019 shares	Dec. 31, 2018 USD ($)
Debt Instrument, Face Amount														$ 6,425,666					$ 5,146,226
Debt Instrument, Unamortized Discount, Total														493,490					350,426
Gain (Loss) on Extinguishment of Debt, Total														(300,000)
Payments for Penalties														84,898
Derivative Liability, Total														2,814,798					50,989
Other Nonoperating Expense, Total												$ 1,117,075	$ 569,776	1,117,075	569,776
Bridge Loan Warrants [Member]
Derivative Liability, Total														0					50,989
Dr. Schwartz Notes Warrants [Member]
Derivative Liability, Total																			0		$ 22,644
Promissory Note 2020 Conversion Feature, Tranche One [Member]
Embedded Derivative, Fair Value of Embedded Derivative Liability														68,796
Promissory Note 2020 Conversion Feature, Tranche Two [Member]
Embedded Derivative, Fair Value of Embedded Derivative Liability														52,125
Put Option, Tranche One [Member]
Embedded Derivative, Fair Value of Embedded Derivative Liability														17,256
Put Option, Tranche Two [Member]
Embedded Derivative, Fair Value of Embedded Derivative Liability														17,824
A, B and Agent Warrants [Member]
Derivative Liability, Total														2,779,718				$ 2,669,995
Gain (Loss) on Derivative Instruments, Net, Pretax, Total														109,723
Other Expense [Member]
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net, Total														$ (19,408)
Investor of Promissory Note [Member]
Stock Issued During Period, Shares, New Issues (in shares) | shares				46,875
Chief Executive Officer [Member]
Stock Issued During Period, Shares, New Issues (in shares) | shares							50,000
Proceeds from Related Party Debt										$ 370,000						$ 1,920,000
Conversion of Bridge Loan to Common Stock [Member]
Debt Conversion, Original Debt, Amount															$ 90,000
Debt Conversion, Converted Instrument, Shares Issued (in shares) | shares														170,000	15,985
Bridge Loan Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares						107,178
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares						$ 11.55
Dr. Schwartz Notes Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares																22,129
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares																$ 8.36
Warrant for Promissory Notes [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares								68,237
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares								$ 6.21
Warrants Issued With Promissory Note, One [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares				94,631
Warrants Issued With Promissory Note, Two [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares			92,700
Warrants Issued With Promissory Note, Three [Member] | Subsequent Event [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares	92,700										92,700
Warrants Issued With Promissory Note [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares				$ 2.992
Warrants Issued for 2019 Agreement [Member] | Chief Executive Officer [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares																				5,753
Convertible Promissory Note [Member]
Debt Instrument, Face Amount														$ 1,721,776					1,989,104
Dr. Schwartz Note, One [Member]
Debt Instrument, Face Amount																					370,000
Debt Instrument, Unamortized Discount, Total																					$ 63,028
DrSchwartz Notes [Member]
Debt Instrument, Face Amount							$ 2,115,000							2,115,000					$ 2,115,000
Debt Instrument, Interest Rate, Stated Percentage							12.00%
Short-term Debt, Total														2,115,000
DrSchwartz Notes [Member] | Subsequent Event [Member]
Short-term Debt, Total																	$ 2,192,878
Second Promissory Note [Member]
Debt Instrument, Face Amount				$ 1,450,000
Debt Instrument, Interest Rate, Stated Percentage				8.00%
Penalties Accrued														194,000
Debt Instrument, Unamortized Discount, Total														364,366
Short-term Debt, Total														970,000
Proceeds from Short-term Debt, Total			$ 400,000	$ 400,000							$ 1,200,000
Payments for Penalties														0
Debt Instrument, Convertible, Conversion Price (in dollars per share) | $ / shares				$ 2.589
Second Promissory Note [Member] | Subsequent Event [Member]
Proceeds from Short-term Debt, Total	$ 400,000
Borrowings Against Equity Line [Member]
Debt Instrument, Face Amount														$ 1,098,684
Debt Instrument, Interest Rate, Stated Percentage														8.00%
Penalties Accrued														$ 160,380
Short-term Debt, Total														638,057
Proceeds from Short-term Debt, Total														1,020,000
Payments for Penalties														84,898
Repayments of Short-term Debt, Total														821,816
Bridge Notes [Member] | Convertible Promissory Note [Member]
Debt Instrument, Face Amount						$ 2,297,727
Proceeds from Notes Payable, Total						$ 2,000,000
Stock Issued During Period, Shares, New Issues (in shares) | shares						65,000			16,667
Debt Instrument, Interest Rate, Stated Percentage						8.00%
Debt Instrument, Increase (Decrease), Net, Total									$ 344,659
Penalties Accrued														430,444
Bridge Loan														1,721,776
Debt Instrument, Unamortized Discount, Total														93,374
Debt Instrument, Convertible, Threshold Trading Days						20
Conversion Shares, Sum of Number of Conversion Shares Plus Inducement Shares (in shares) | shares						267,833
Securities Purchase Agreements [Member] | Promissory Note [Member]
Debt Instrument, Face Amount		$ 300,000						$ 847,500
Stock Issued During Period, Shares, New Issues (in shares) | shares								8,857
Debt Instrument, Interest Rate, Stated Percentage								8.00%
Penalties Accrued														196,167
Debt Instrument, Unamortized Discount, Total														35,750
Debt Instrument, Convertible, Threshold Trading Days					20
Short-term Debt, Total														980,833
Proceeds from Short-term Debt, Total								$ 700,000
Stock Issued During Period, Shares, Extension of Notes Payable (in shares) | shares		30,000
Gain (Loss) on Extinguishment of Debt, Total														300,000
Payments for Penalties														$ 0