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Note 14 - Leases (Details Textual) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 USD ($) ft² a | Sep. 30, 2020 USD ($) | Sep. 30, 2021 USD ($) ft² a | Sep. 30, 2021 EUR (€) ft² a | Sep. 30, 2020 USD ($)
Operating Lease, Payments | $ 702,000 | $ 219,000 | $ 2,000,000.0 |  | $ 653,000
Bothell, Washington Headquarters [Member] |  |  |  |  |
Area of Real Estate Property (Square Foot) | ft² | 32,106 |  | 32,106 | 32,106 |
Lease Agreement, Tenant Allowance |  |  | $ 2,600,000 |  |
Lessee, Operating Lease, Renewal Term (Year) | 5 years |  | 5 years | 5 years |
Monthly Base Rent Expense |  |  | $ 70,000 |  |
Menlo Park, California Location [Member] |  |  |  |  |
Area of Real Estate Property (Square Foot) | ft² | 3,460 |  | 3,460 | 3,460 |
Monthly Base Rent Expense |  |  | $ 11,000 |  |
Albuquerque, New Mexico Location [Member] |  |  |  |  |
Area of Real Estate Property (Square Foot) | ft² | 9,932 |  | 9,932 | 9,932 |
Lessee, Operating Lease, Renewal Term (Year) | 3 years |  | 3 years | 3 years |
Monthly Base Rent Expense |  |  | $ 9,000 |  |
Detroit, Michigan Location [Member] |  |  |  |  |
Area of Real Estate Property (Square Foot) | ft² | 106,998 |  | 106,998 | 106,998 |
Monthly Base Rent Expense |  |  | $ 35,000 |  |
United States, First Lease Agreement [Member] |  |  |  |  |
Area of Real Estate Property (Square Foot) | ft² | 16,800 |  | 16,800 | 16,800 |
Monthly Base Rent Expense |  |  | $ 14,000 |  |
United States, Second Lease Agreement [Member] |  |  |  |  |
Area of Real Estate Property (Square Foot) | ft² | 20,000 |  | 20,000 | 20,000 |
Monthly Base Rent Expense |  |  | $ 14,000 |  |
United States, Third Lease Agreement [Member] |  |  |  |  |
Area of Real Estate Property (Square Foot) | a | 12,500 |  | 12,500 | 12,500 |
Monthly Base Rent Expense |  |  | $ 8,000 |  |
The United States of America [Member] |  |  |  |  |
Area of Real Estate Property (Square Foot) | ft² | 16,153 |  | 16,153 | 16,153 |
Monthly Base Rent Expense |  |  | $ 13,000 |  |
The United States of America, Second Lease [Member] |  |  |  |  |
Area of Real Estate Property (Square Foot) | ft² | 26,800 |  | 26,800 | 26,800 |
Lessee, Operating Lease, Renewal Term (Year) | 5 years |  | 5 years | 5 years |
Monthly Base Rent Expense |  |  | $ 27,000 |  |
Lessee, Operating Lease, Yearly Rent Increase Percentage |  |  | 2.50% | 2.50% |
The Netherlands Lease Agreement [Member] |  |  |  |  |
Area of Real Estate Property (Square Foot) | a | 47,533 |  | 47,533 | 47,533 |
Lessee, Operating Lease, Renewal Term (Year) | 5 years |  | 5 years | 5 years |
Monthly Base Rent Expense |  |  | $ 33,000 | € 29,000 |
Lease in Athens, Ohio [Member] |  |  |  |  |
Area of Real Estate Property (Square Foot) | ft² | 50,000 |  | 50,000 | 50,000 |
Monthly Base Rent Expense |  |  | $ 23,000 |  |
Lease in Columbus, Ohio [Member] |  |  |  |  |
Area of Real Estate Property (Square Foot) | ft² | 1,807 |  | 1,807 | 1,807 |
Monthly Base Rent Expense |  |  | $ 4,000 |  |
Lease in Nelsonville, Ohio [Member] |  |  |  |  |
Area of Real Estate Property (Square Foot) | ft² | 22,764 |  | 22,764 | 22,764 |
Monthly Base Rent Expense |  |  | $ 10,000 |  |
Indianapolis Indiana [Member] |  |  |  |  |
Area of Real Estate Property (Square Foot) | ft² | 11,415 |  | 11,415 | 11,415 |
Monthly Base Rent Expense |  |  | $ 13,000 |  |

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