Note 16 - Fair Value Measurements - Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands		Dec. 31, 2023	Dec. 31, 2022
Total		$ 183,358	$ 193,244
Liabilities		18,879	6,858
Money market funds			188,769
Warrant Liabilities [Member]
Liabilities	[1]	533	227
Fair Value, Inputs, Level 1 [Member]
Total		0	0
Liabilities		0	0
Money market funds			0
Fair Value, Inputs, Level 1 [Member] | Warrant Liabilities [Member]
Liabilities	[1]	0	0
Fair Value, Inputs, Level 2 [Member]
Total		181,518	193,244
Liabilities		533	227
Money market funds			188,769
Fair Value, Inputs, Level 2 [Member] | Warrant Liabilities [Member]
Liabilities	[1]	533	227
Fair Value, Inputs, Level 3 [Member]
Total		1,840	0
Liabilities		18,346	6,631
Money market funds			0
Fair Value, Inputs, Level 3 [Member] | Warrant Liabilities [Member]
Liabilities	[1]	0	0
Certificates of Deposit [Member]
Cash Equivalents	[2]	1,533	1,693
Cash Equivalents	[2]	1,533	1,693
Short term investments	[2]	3,721	2,620
Certificates of deposit (1)	[2]		162
Certificates of Deposit [Member] | Fair Value, Inputs, Level 1 [Member]
Cash Equivalents	[2]	0	0
Cash Equivalents	[2]	0	0
Short term investments	[2]	0	0
Certificates of deposit (1)	[2]		0
Certificates of Deposit [Member] | Fair Value, Inputs, Level 2 [Member]
Cash Equivalents	[2]	1,533	1,693
Cash Equivalents	[2]	1,533	1,693
Short term investments	[2]	3,721	2,620
Certificates of deposit (1)	[2]		162
Certificates of Deposit [Member] | Fair Value, Inputs, Level 3 [Member]
Cash Equivalents	[2]	0	0
Cash Equivalents	[2]	0	0
Short term investments	[2]	0	0
Certificates of deposit (1)	[2]		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)	[3]	1,840
Company Earn-Outs [Member]
Liabilities	[1]	18,346	6,631
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]	$ 18,346	$ 6,631

[1] Refer to "Note 13 - Company Earn-Out and Warrant Liabilities" for further details.

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

[3] Other assets include yielding loan notes to a third party with a total commitment of up to $5.0 million and maturities of greater than twelve months. The notes bear interest at an annual rate equal to 8%. During the years ended December 31, 2023 and 2022, new notes receivables issued were $1.3 million and $0.5 million, respectively. Fair values are based on discounted future cash flows using current interest rates offered for similar notes to third parties with similar credit ratings for the same remaining maturities.