v3.19.3
Note 9 - Redeemable Convertible Preferred Stock (Details Textual) - shares
1 Months Ended
May 31, 2019
Sep. 30, 2019
Dec. 31, 2018
Preferred Stock, Shares Issued, Total   0 0
Preferred Stock, Shares Authorized   1,000,000 1,000,000
Preferred Stock, Shares Outstanding, Ending Balance   0 0
Conversion of Notes into Series B Convertible Preferred Stock [Member]      
Debt Conversion, Converted Instrument, Shares Issued 367,041    
Series A Redeemable Convertible Preferred Stock [Member]      
Temporary Equity, Shares Issued     2,034,548
Temporary Equity, Shares Outstanding   0 2,034,548
Series B Redeemable Convertible Preferred Stock [Member]      
Temporary Equity, Shares Issued     1,833,387
Temporary Equity, Shares Outstanding   0 1,833,387