Note 15 - Leases (Details Textual)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Dec. 31, 2019	May 26, 2017 ft²
Operating Lease, Cost	$ 100,000	$ 100,000	$ 300,000	$ 300,000
Operating Lease, Payments	$ 200,000	$ 100,000	$ 300,000	$ 300,000
Operating Lease, Weighted Average Remaining Lease Term (Year)	5 years 7 days		5 years 7 days
Operating Lease, Weighted Average Discount Rate, Percent	4.53%		4.53%
Operating Lease, Liability, Total	$ 2,835,983		$ 2,835,983
Other Liabilities [Member]
Operating Lease, Liability, Total	2,400,000		$ 2,400,000
Facilities and Office Space in Corvallis Oregon [Member]
Lessee, Operating Lease, First Renewal Term (Year)					2 years
Lessee, Operating Lease, Second Renewal Term (Year)					3 years
Increase (Decrease) in Operating Lease Liability	700,000
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 700,000
The New HQ Lease [Member] | MacAndrews and Forbes Incorporated [Member]
Lessee, Operating Lease, Term of Contract (Year)						10 years
Area of Real Estate Property (Square Foot) | ft²						3,200