Note 9 - Income Taxes - Provision (Benefit) for Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2019	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018
Federal
State
Total current tax provision
Federal						(1,541)
State
Total deferred tax provision						(1,541)
Provision (benefit) for income taxes	$ 0	$ 0	$ 0	$ 0	$ 0	$ (1,541)