Note 19 - The Financing and Warrant Liabilities - Fair Value of Warrants (Details)	Dec. 31, 2018 yr	Jan. 17, 2018 yr
Measurement Input, Share Price [Member] | Investor Warrants [Member]
Fair value of the warrants	1.34	3.98
Measurement Input, Share Price [Member] | Placement Agent Warrants [Member]
Fair value of the warrants	1.34	3.98
Measurement Input, Expected Term [Member] | Investor Warrants [Member]
Fair value of the warrants	1.55	2.5
Measurement Input, Expected Term [Member] | Placement Agent Warrants [Member]
Fair value of the warrants	2.05	3
Measurement Input, Risk Free Interest Rate [Member] | Investor Warrants [Member]
Fair value of the warrants	0.025	0.0222
Measurement Input, Risk Free Interest Rate [Member] | Placement Agent Warrants [Member]
Fair value of the warrants	0.025	0.0239
Measurement Input, Expected Dividend Rate [Member] | Investor Warrants [Member]
Fair value of the warrants
Measurement Input, Expected Dividend Rate [Member] | Placement Agent Warrants [Member]
Fair value of the warrants
Measurement Input, Price Volatility [Member] | Investor Warrants [Member]
Fair value of the warrants	1.99	1.58
Measurement Input, Price Volatility [Member] | Placement Agent Warrants [Member]
Fair value of the warrants	1.76	1.47
Measurement Input, Exercise Price [Member] | Investor Warrants [Member]
Fair value of the warrants	6.6	6.6
Measurement Input, Exercise Price [Member] | Placement Agent Warrants [Member]
Fair value of the warrants	6.6	6.6
Measurement Input, Quoted Price [Member] | Investor Warrants [Member]
Fair value of the warrants	0.78	2.93
Measurement Input, Quoted Price [Member] | Placement Agent Warrants [Member]
Fair value of the warrants	0.8	2.99