CONSOLIDATED CONDENSED BALANCE SHEETS (Parentheticals) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Common stock, shares authorized (in shares)	500,000,000	500,000,000
Common stock, par value per share (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares issued (in shares)	86,394,716	85,800,303
Common stock, shares outstanding (in shares)	86,394,716	85,800,303
Preferred stock, shares authorized (in shares)	100,000,000	100,000,000
Preferred stock, par value per share (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Special stock, shares issued (in shares)	100	100
Special stock, par value per share (in dollars per share)	$ 0.001	$ 0.001
Special stock, shares outstanding (in shares)	100	100
Minority interest		$ 141