CONSOLIDATED BALANCE SHEETS (Parentheticals) - shares	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Stockholders' Equity Attributable to Parent [Abstract]
Preferred stock, shares authorized (in shares)	50,000,000	50,000,000	50,000,000
Common stock, shares authorized (in shares)	750,000,000	750,000,000	750,000,000
Common stock, shares outstanding (in shares)	316,919,782	288,470,244	291,712,925	273,769,513
Convertible Preferred Stock Series A
Stockholders' Equity Attributable to Parent [Abstract]
Preferred stock, shares outstanding (in shares)		17,250,000	17,250,000
Convertible Preferred Stock Series B
Stockholders' Equity Attributable to Parent [Abstract]
Preferred stock, shares outstanding (in shares)		5,750,000	5,750,000
Series C Preferred Stock
Stockholders' Equity Attributable to Parent [Abstract]
Preferred stock, shares outstanding (in shares)	900,000	900,000