Note 5 - Equity (Details) $ / shares in Units, $ in Millions		3 Months Ended
	Aug. 31, 2016 employee $ / shares shares	Mar. 31, 2020 USD ($) $ / shares shares	Dec. 31, 2019 $ / shares shares
EQUITY
Common stock, shares authorized (in shares)		260,000,000	260,000,000
Preferred stock, shares authorized (in shares)		50,000,000	50,000,000
Preferred stock, par value (in dollars per share) | $ / shares		$ 0.01	$ 0.01
Granted (in shares)		3,300,000
Restricted Stock
EQUITY
Compensation costs | $		$ 0.9
Unrecognized compensation cost | $		$ 8.8
Weighted-average period		2 years 3 months 18 days
Unvested restricted stock		3,342,393	1,628,241
Granted		1,714,152
Stock Options
EQUITY
Granted (in shares)	937,424
Number of individuals | employee	2
Purchase price (per share) | $ / shares	$ 5.34
Expiration period	10 years