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Note 10 - Leases (Details Textual)	Dec. 31, 2022 ft²
Additional Number of Leases	3
Operating Lease, Weighted Average Remaining Lease Term (Year)	1 year 9 months 7 days
Operating Lease, Weighted Average Discount Rate, Percent	4.48%
Minimum [Member]
Lessee, Operating Lease, Remaining Lease Term (Year)	1 year
Maximum [Member]
Lessee, Operating Lease, Remaining Lease Term (Year)	2 years 4 months 24 days
Office Building [Member] | Gallarate Italy [Member]
Area of Real Estate Property (Square Foot)	1,335
Office Building [Member] | Aurora Illinois [Member]]
Area of Real Estate Property (Square Foot)	11,000
Office Building [Member] | Overland Park [Member]
Area of Real Estate Property (Square Foot)	600

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Additional Number Of Leases

+ References

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- Definition

Area of a real estate property.

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- Definition

Remaining lease term of operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
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- Definition

Weighted average discount rate for operating lease calculated at point in time.

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-Topic 842
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- Definition

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