Note 4 - Fair Value Measurements - Summary of Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands		Jun. 30, 2024	Dec. 31, 2023
Cash and cash equivalents (1)	[1]	$ 7,782	$ 17,096
Restricted cash		1,517	1,642
Total assets		9,299	22,709
Short-term investments		0	3,971
Contingent consideration		14,400	2,220
Warrant liabilities		5,597	5,888
Total liabilities		19,997	8,108
Fair Value, Inputs, Level 1 [Member]
Cash and cash equivalents (1)	[1]	7,782	17,096
Restricted cash		1,517	1,642
Total assets		9,299	18,738
Short-term investments			0
Contingent consideration		0	0
Warrant liabilities		0	0
Total liabilities		0	0
Fair Value, Inputs, Level 2 [Member]
Cash and cash equivalents (1)	[1]	0	0
Restricted cash		0	0
Total assets		0	3,971
Short-term investments			3,971
Contingent consideration		0	0
Warrant liabilities		0	0
Total liabilities		0	0
Fair Value, Inputs, Level 3 [Member]
Cash and cash equivalents (1)	[1]	0	0
Restricted cash		0	0
Total assets		0	0
Short-term investments			0
Contingent consideration		14,400	2,220
Warrant liabilities		5,597	5,888
Total liabilities		$ 19,997	$ 8,108

[1] Includes investments that are readily convertible to cash with original maturities of 90 days or less.