Note 4 - Leases (Details Textual) - USD ($) $ in Thousands		Mar. 31, 2020	Dec. 31, 2019
Operating Lease, Liability, Total	[1]	$ 9,264
Operating Lease, Liability, Current		$ 1,954	$ 1,867

[1] Includes the current portion of operating lease liabilities of $2.0 million as of March 31, 2020.