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Note 13 - Commitments and Contingencies (Details Textual) $ in Millions |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jan. 01, 2018 | Jun. 30, 2021 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | May 26, 2017 ft²
Operating Lease, Cost |  |  | $ 0.6 | $ 0.7 |
Operating Lease, Payments |  |  | $ 0.6 | $ 0.6 |
Operating Lease, Weighted Average Remaining Lease Term (Year) |  |  | 4 years 7 months 6 days |  |
Operating Lease, Weighted Average Discount Rate, Percent |  |  | 4.53% |  |
Purchase Commitment, Remaining Minimum Amount Committed |  |  | $ 20.1 |  |
Other Liabilities [Member] |  |  |  |  |
Operating Lease, Liability, Noncurrent |  |  | $ 2.1 |  |
Two Years, Option Renewal Term [Member] | Facilities and Office Space in Corvallis Oregon [Member] |  |  |  |  |
Lessee, Operating Lease, Number of Renewal Options | 2 |  |  |  |
Lessee, Operating Lease, Renewal Term (Year) | 2 years |  |  |  |
Increase (Decrease) in Operating Right-of-use Assets |  | $ 0.7 |  |  |
Increase (Decrease) in Operating Lease Liability |  | $ 0.7 |  |  |
Three Years, Option RenewalTerm [Member] | Facilities and Office Space in Corvallis Oregon [Member] |  |  |  |  |
Lessee, Operating Lease, Renewal Term (Year) | 3 years |  |  |  |
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

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