Quarterly report pursuant to Section 13 or 15(d)

Note 4 - Stockholders' Equity (Details Textual)

v3.19.1
Note 4 - Stockholders' Equity (Details Textual) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended
Apr. 30, 2019
Aug. 31, 2017
Dec. 31, 2016
May 31, 2016
Mar. 31, 2019
Sep. 30, 2018
Mar. 31, 2018
Sep. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period         10 years      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant         10,900,000      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value           $ 0.34    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross         800,000   0  
Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount         $ 250,000      
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition         292 days      
Additional Research and Development Expense Due to Modifications         $ 102,000      
Series A 4.5% Convertible Preferred Stock [Member] | Subsequent Event [Member]                
Conversion of Stock, Shares Converted 465,191              
Stock Issued During Period, Shares, Conversion of Convertible Securities 1,808,377              
Series A 4.5% Convertible Preferred Stock [Member] | Private Placement [Member]                
Stock Issued During Period, Shares, New Issues     1,000,000          
Preferred Stock, Dividend Rate, Percentage     4.50%          
Convertible Preferred Stock, Issuable Upon Conversion of All Shares     3,887,387          
Stock Purchase Warrants [Member]                
Class of Warrant or Right, Issued During Period   2,250,000   1,746,173 500,000      
Class of Warrant or Right, Outstanding         2,982,709      
Class of Warrant or Right, Exercise Price of Warrants or Rights         $ 0.30      
Class of Warrant or Right, Granted During Period, Weighted Average Grant Date Fair Value         $ 0.19      
Class of Warrant or Right, Vesting Percentage on Grant         25.00%      
Class of Warrant or Right, Vesting Percentage on Completion of Initial Services         75.00%      
Warrants and Rights Outstanding, Term         2 years 182 days      
Stock Purchase Warrants [Member] | Measurement Input, Expected Dividend Rate [Member]                
Warrants and Rights Outstanding, Measurement Input         0      
Stock Purchase Warrants [Member] | Measurement Input, Risk Free Interest Rate [Member]                
Warrants and Rights Outstanding, Measurement Input         0.025      
Stock Purchase Warrants [Member] | Measurement Input, Price Volatility [Member]                
Warrants and Rights Outstanding, Measurement Input         1.1      
Restricted Stock Units (RSUs) [Member]                
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted         0   0  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period         0      
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number, Ending Balance         33,758      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Weighted Average Grant Date Fair Value         $ 4.66      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Outstanding         $ 15,200      
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Exercised               0
Restricted Stock [Member]                
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition         91 days      
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted         0      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value         $ 1.11      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested         $ 5,100      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance         11,262      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value, Ending Balance         $ 1.11      
Share-based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount         $ 12,500      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period             0