Note 13 - Restatement to Previously Issued Condensed Consolidated Financial Statements (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Preferred Stock, Deemed Dividend		$ 11,479,308		$ 11,479,308
Net Income (Loss) Available to Common Stockholders, Basic, Total	$ (7,262,529)	$ (15,621,885)	$ (11,335,836)	$ (17,496,267)
Earnings Per Share, Basic and Diluted, Total	$ (0.80)	$ (5.08)	$ (1.44)	$ (6.11)
Series B Convertible Preferred Stock [Member]
Deemed Dividend on Series B Convertible Preferred Stock		$ 11,479,308
Previously Reported [Member]
Net Income (Loss) Available to Common Stockholders, Basic, Total		$ (8,924,677)		$ (10,799,059)
Earnings Per Share, Basic and Diluted, Total		$ (2.90)		$ (3.77)
Previously Reported [Member] | Series B Convertible Preferred Stock [Member]
Preferred Stock, Deemed Dividend		$ 4,782,100