Note 6 - Fair Value Measurements (Details Textual) - Acquired 3D Hubs [Member] - USD ($) $ in Thousands		9 Months Ended	11 Months Ended
	Jan. 22, 2021	Sep. 30, 2021	Dec. 31, 2021
Payments to Acquire Businesses, Gross		$ 133,847
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)	863,995
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable	$ 166,700	$ 166,709
Maximum [Member] | Forecast [Member]
Payments to Acquire Businesses, Gross			$ 25,000
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)			143,983
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable			$ 27,800