Note 8 - Commitments and Contingencies - Lease Expense (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Operating lease cost	$ 1,130
Sublease income	(632)
Net lease cost	498
Operational cash flow used for operating leases	$ 1,285
Weighted-average remaining lease term (in years) (Year)	1 year 255 days
Weighted-average discount rate	12.00%