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Note 12 - Stockholders' Equity (Details Textual) - USD ($)								1 Months Ended					2 Months Ended	3 Months Ended		8 Months Ended	12 Months Ended
	Mar. 28, 2019	Mar. 21, 2019	Aug. 24, 2018	Nov. 11, 2015	Oct. 29, 2015	Sep. 23, 2015	Nov. 13, 2014	May 31, 2018	Apr. 30, 2018	Mar. 31, 2018	Oct. 31, 2017	Sep. 30, 2017	May 23, 2018	Mar. 31, 2019	Mar. 31, 2018	May 31, 2018	Dec. 31, 2015	Sep. 30, 2018
Preferred Stock, Shares Authorized														5,000,000
Preferred Stock, Par or Stated Value Per Share														$ 0.0001
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture, Total														$ 16,506	$ 16,513
Class of Warrant or Right, Exercise Price of Warrants or Rights				$ 3.60
Promissory Note [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights						69,445
Securities Purchase Agreement Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights			2,392,502
Class of Warrant or Right, Exercise Price of Warrants or Rights			$ 1.50
Fair Value Adjustment of Warrants			$ 1,288,139
September 2015 Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights			166,668
Class of Warrant or Right, Exercise Price of Warrants or Rights			$ 1.50
Fair Value Adjustment of Warrants			$ 140,827
Private Investor SPA [Member]
Stock Issued During Period, Shares, New Issues							664,584
Class of Warrant or Right, Number of Securities Called by Warrants or Rights							996,877
Proceeds from Issuance of Private Placement							$ 1,595,000
Term Of Warrant							5 years
Class of Warrant or Right, Exercise Price of Warrants or Rights							$ 3.60
Director [Member]
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture, Total	13,820
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture, Total	$ 16,506
Certain Officers, Employees, and Contractors [Member] | Share-based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross		235,334
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		3 years
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period		7 years
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price		$ 1.18
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Fair Value Amount		$ 243,643
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate		2.35%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term		4 years 182 days
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate		0.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate		143.00%
Conversion of Series A-1 Shares into Common Stock [Member]
Conversion of Stock, Shares Issued																2,500,000
Conversion of Dividends Payable on Series A-1 Preferred Stock to Common Stock [Member]
Conversion of Dividends Payable, Shares Issued																248,893
Conversion of Dividends Payable, Amount Converted																$ 896,015
Conversion of Series B-1 Shares into Common Stock [Member]
Conversion of Stock, Shares Issued													2,916,668
Conversion of Dividends Payable on Series B-1 Preferred Stock to Common Stock [Member]
Conversion of Dividends Payable, Shares Issued													131,229
Conversion of Dividends Payable, Amount Converted													$ 472,426		$ 417,084
Series A-1 Convertible Preferred Stock [Member]
Preferred Stock, Shares Authorized														100,000
Stock Issued During Period, Shares, New Issues				5,500	84,500												90,000
Preferred Stock, Shares Outstanding, Ending Balance														0
Share Price				$ 100	$ 100
Proceeds from Issuance of Convertible Preferred Stock				$ 550,000	$ 8,450,000
Conversion of Dividends Payable, Amount Converted								$ 25,463	$ 330,552			$ 540,000
Preferred Stock, Shares Issued, Total														0
Series B-1 Convertible Preferred Stock [Member]
Preferred Stock, Shares Authorized														105,000
Stock Issued During Period, Shares, New Issues				105,000													105,000
Preferred Stock, Shares Outstanding, Ending Balance														0				0
Share Price				$ 100
Proceeds from Issuance of Convertible Preferred Stock				$ 10,500,000
Conversion of Dividends Payable, Amount Converted								$ 55,342		$ 417,084
Preferred Stock, Shares Issued, Total																		0
September 2015 Warrants [Member]
Term Of Warrant						5 years
Class of Warrant or Right, Exercise Price of Warrants or Rights						$ 3.60

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