Note 4 - Fair Value Measurements - Summary of Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands		Mar. 31, 2024	Dec. 31, 2023
Cash and cash equivalents (1)	[1]	$ 6,995	$ 17,096
Restricted cash		1,483	1,642
Short-term investments		994	3,971
Total assets		9,472	22,709
Contingent consideration		8,700	2,220
Warrant liabilities		3,772	5,888
Total liabilities		12,472	8,108
Fair Value, Inputs, Level 1 [Member]
Cash and cash equivalents (1)	[1]	6,995	17,096
Restricted cash		1,483	1,642
Short-term investments		0	0
Total assets		8,478	18,738
Contingent consideration		0	0
Warrant liabilities			0
Total liabilities		0	0
Fair Value, Inputs, Level 2 [Member]
Cash and cash equivalents (1)	[1]	0	0
Restricted cash		0	0
Short-term investments		994	3,971
Total assets		994	3,971
Contingent consideration		0	0
Warrant liabilities			0
Total liabilities		0	0
Fair Value, Inputs, Level 3 [Member]
Cash and cash equivalents (1)	[1]	0	0
Restricted cash		0	0
Short-term investments		0	0
Total assets		0	0
Contingent consideration		8,700	2,220
Warrant liabilities		3,772	5,888
Total liabilities		$ 12,472	$ 8,108

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