Note 14 - Financial Instruments - Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands		Sep. 30, 2023	Dec. 31, 2022
Short term investments		$ 178,862	$ 193,244
Liabilities		14,219	6,858
Money market funds (2)	[1]		188,769
Company Earn-Outs [Member]
Liabilities	[2]		6,631
Warrant Liabilities [Member]
Liabilities	[2]	397	227
Fair Value, Inputs, Level 1 [Member]
Short term investments			0
Liabilities		0	0
Money market funds (2)	[1]		0
Fair Value, Inputs, Level 1 [Member] | Company Earn-Outs [Member]
Liabilities	[2]		0
Fair Value, Inputs, Level 1 [Member] | Warrant Liabilities [Member]
Liabilities	[2]	0	0
Fair Value, Inputs, Level 2 [Member]
Short term investments			193,244
Liabilities		397	227
Money market funds (2)	[1]		188,769
Fair Value, Inputs, Level 2 [Member] | Company Earn-Outs [Member]
Liabilities	[2]		0
Fair Value, Inputs, Level 2 [Member] | Warrant Liabilities [Member]
Liabilities	[2]	397	227
Fair Value, Inputs, Level 3 [Member]
Short term investments			0
Liabilities		13,822	6,631
Money market funds (2)	[1]		0
Fair Value, Inputs, Level 3 [Member] | Company Earn-Outs [Member]
Liabilities	[2]		6,631
Fair Value, Inputs, Level 3 [Member] | Warrant Liabilities [Member]
Liabilities	[2]	0	0
Certificates of Deposit [Member]
Cash Equivalents	[3]	1,483	1,693
Cash Equivalents	[3]	1,483	1,693
Short term investments	[3]	3,478	2,620
Certificates of deposit (1)	[3]		162
Certificates of Deposit [Member] | Fair Value, Inputs, Level 1 [Member]
Cash Equivalents	[3]	0	0
Cash Equivalents	[3]	0	0
Short term investments	[3]	0	0
Short term investments		0
Certificates of deposit (1)	[3]		0
Certificates of Deposit [Member] | Fair Value, Inputs, Level 2 [Member]
Cash Equivalents	[3]	1,483	1,693
Cash Equivalents	[3]	1,483	1,693
Short term investments	[3]	3,478	2,620
Short term investments		178,862
Certificates of deposit (1)	[3]		162
Certificates of Deposit [Member] | Fair Value, Inputs, Level 3 [Member]
Cash Equivalents	[3]	0	0
Cash Equivalents	[3]	0	0
Short term investments	[3]	0	0
Short term investments		0
Certificates of deposit (1)	[3]		$ 0
Money Market Funds [Member]
Cash Equivalents	[1]	4,108
Cash Equivalents	[1]	4,108
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Cash Equivalents	[1]	0
Cash Equivalents	[1]	0
Money Market Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Cash Equivalents	[1]	4,108
Cash Equivalents	[1]	4,108
Money Market Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Cash Equivalents	[1]	0
Cash Equivalents	[1]	0
US Treasury Securities [Member]
Cash Equivalents		169,793
Cash Equivalents		169,793
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		169,793
Cash Equivalents		169,793
US Treasury Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Cash Equivalents		0
Cash Equivalents		0
Company Earn-Outs [Member]
Liabilities	[2]	13,822
Company Earn-Outs [Member] | Fair Value, Inputs, Level 1 [Member]
Liabilities	[2]	0
Company Earn-Outs [Member] | Fair Value, Inputs, Level 2 [Member]
Liabilities	[2]	0
Company Earn-Outs [Member] | Fair Value, Inputs, Level 3 [Member]
Liabilities	[2]	$ 13,822

[1] Profits on securities for the three and nine months ended September 30, 2023 were $2.2 million and $5.8 million, respectively, and for the three and nine months ended September 30, 2022 were $1.2 million and $1.2 million, respectively.

[2] Refer to “Note 11 — Earn-Out and Warrant Liabilities” for further details.

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