Note 14 - Financial Instruments - Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands		Mar. 31, 2024		Dec. 31, 2023
Money market funds		$ 178,581
Total		186,251		$ 183,358
Liabilities		17,526		18,879
Warrant Liabilities [Member]
Liabilities	[1]	386		533
Fair Value, Inputs, Level 1 [Member]
Money market funds		0
Total		0		0
Liabilities		0		0
Fair Value, Inputs, Level 1 [Member] | Warrant Liabilities [Member]
Liabilities	[1]	0		0
Fair Value, Inputs, Level 2 [Member]
Money market funds		178,581
Total		183,837		181,518
Liabilities		386		533
Fair Value, Inputs, Level 2 [Member] | Warrant Liabilities [Member]
Liabilities	[1]	386		533
Fair Value, Inputs, Level 3 [Member]
Money market funds		0
Total		2,414		1,840
Liabilities		17,140		18,346
Fair Value, Inputs, Level 3 [Member] | Warrant Liabilities [Member]
Liabilities	[1]	0		0
Certificates of Deposit [Member]
Cash Equivalents	[2]	1,509		1,533
Short term investments	[2]	3,747		3,721
Cash Equivalents	[2]	1,509		1,533
Certificates of Deposit [Member] | Fair Value, Inputs, Level 1 [Member]
Cash Equivalents	[2]	0		0
Short term investments	[2]	0		0
Cash Equivalents	[2]	0		0
Certificates of Deposit [Member] | Fair Value, Inputs, Level 2 [Member]
Cash Equivalents	[2]	1,509		1,533
Short term investments	[2]	3,747		3,721
Cash Equivalents	[2]	1,509		1,533
Certificates of Deposit [Member] | Fair Value, Inputs, Level 3 [Member]
Cash Equivalents	[2]	0		0
Short term investments	[2]	0		0
Cash Equivalents	[2]	0		0
Money Market Funds [Member]
Cash Equivalents				4,423
Cash Equivalents				4,423
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Cash Equivalents				0
Cash Equivalents				0
Money Market Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Cash Equivalents				4,423
Cash Equivalents				4,423
Money Market Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Cash Equivalents				0
Cash Equivalents				0
US Treasury Securities [Member]
Cash Equivalents				171,841
Cash Equivalents				171,841
US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Cash Equivalents				0
Cash Equivalents				0
US Treasury Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Cash Equivalents				171,841
Cash Equivalents				171,841
US Treasury Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Cash Equivalents				0
Cash Equivalents				0
Notes Receivable [Member]
Notes receivables	[3]	2,414		1,840
Notes Receivable [Member] | Fair Value, Inputs, Level 1 [Member]
Notes receivables		0	[3]	0
Notes Receivable [Member] | Fair Value, Inputs, Level 2 [Member]
Notes receivables		0	[3]	0
Notes Receivable [Member] | Fair Value, Inputs, Level 3 [Member]
Notes receivables	[3]	2,414		1,840
Company Earn-Outs [Member]
Liabilities	[1]	17,140		18,346
Company Earn-Outs [Member] | Fair Value, Inputs, Level 1 [Member]
Liabilities	[1]	0		0
Company Earn-Outs [Member] | Fair Value, Inputs, Level 2 [Member]
Liabilities	[1]	0		0
Company Earn-Outs [Member] | Fair Value, Inputs, Level 3 [Member]
Liabilities	[1]	$ 17,140		$ 18,346

[1] Refer to “Note 10 — Earn-Out and Warrant Liabilities” for further details.

[2] The majority of certificates of deposit are foreign deposits.

[3] Refer to “Note 12 — Variable Interest Entity” for further details.