CONSOLIDATED CONDENSED BALANCE SHEETS (Parentheticals) - $ / shares	Mar. 31, 2020	Dec. 31, 2019
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)	86,814,466	86,600,302
Common stock, shares outstanding (in shares)	86,814,466	86,600,302
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