Note 6 - Leases - Leases Cost (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	Jan. 01, 2019	Sep. 30, 2019		Sep. 30, 2019
Operating lease costs		$ 377		$ 1,013
Short-term and other lease costs		102		394
Total lease costs		479		1,407
Operating cash flows from operating leases		299		1,026
ROU assets obtained in exchange for operating lease liabilities (1)	$ 2,200	$ 869	[1]	$ 3,450	[1]
Weighted-average remaining lease term (in years) (Year)		2 years 3 months 18 days		2 years 3 months 18 days
Weighted-average discount rate		3.90%		3.90%

[1] For the nine months ended September 30, 2019, the amount includes $2.2 million for operating leases existing on January 1, 2019.