Note 5 - Leases - Lease Information (Details) - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Right-of-use operating lease assets, net	$ 765,000	$ 859,000
Non-current lease liability	$ 648,000	$ 761,000
Weighted average remaining lease term (Year)	3 years 255 days
Discount rate	22.00%
Current Liabilities [Member]
Current lease liability	$ 147,000