Note 1 - Basis of Presentation (Details Textual) - USD ($) $ in Thousands |
Mar. 31, 2020 |
Dec. 31, 2019 |
---|---|---|
Operating Lease, Liability, Current | $ 1,140 | $ 1,150 |
Operating Lease, Liability, Noncurrent | $ 1,687 | 1,940 |
Revision of Prior Period, Adjustment [Member] | ||
Operating Lease, Liability, Current | 476 | |
Operating Lease, Liability, Noncurrent | $ (476) |