Note 7 - Leases - Leases Cost (Details) - USD ($) $ in Thousands		12 Months Ended
	Jan. 01, 2019	Dec. 31, 2019
Operating lease costs		$ 1,509
Short-term and other lease costs		465
Total lease costs		1,974
Operating cash flows from operating leases		1,364
ROU assets obtained in exchange for new operating lease liabilities (1)	$ 2,300	$ 3,667	[1]
Weighted-average remaining lease term (in years) (Year)		2 years 1 month 6 days
Weighted-average discount rate		3.70%

[1] The amount includes $2.3 million for operating leases existing on January 1, 2019.