Note 13 - Commitments - Lease Expense (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2019 USD ($)
Operating lease cost	$ 322	$ 963
Short-term lease cost	186	553
Variable lease cost	239	705
Total lease cost	747	2,221
Cash paid for amounts included in the measurement of lease liabilities	250	765
Operating lease liabilities arising from obtaining right-of-use assets	$ 136	$ 136
Weighted average remaining lease term (Year)	12 years 182 days	12 years 182 days
Weighted average discount rate	7.80%	7.80%