Note 2 - Summary of Significant Accounting Policies - Revision of Error (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jan. 01, 2020	Dec. 31, 2019
Right of Use Operating Lease Asset	$ 430	$ 362	$ 362
Operating Lease Liabilities - current	175	182	182
Operating Lease Liabilities - non current	$ 247	180	180
Previously Reported [Member]
Right of Use Operating Lease Asset			980
Operating Lease Liabilities - current			300
Operating Lease Liabilities - non current			$ 680
Revision of Prior Period, Error Correction, Adjustment [Member]
Right of Use Operating Lease Asset		(618)
Operating Lease Liabilities - current		(118)
Operating Lease Liabilities - non current		$ (500)