Note 6 - Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2022

Table Text Block [Abstract]

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation

The following table summarizes the activity of the Company’s Level 3 warrant liabilities which are fair valued on a recurring basis (in thousands):

	Year Ended December 31,
Warrant Liabilities	2022			2021
Fair value at beginning of period	$	2,651		$	1,830
Initial fair value at the original issuance date		1,110			25,417
Equity classified warrant put feature activated		—			51
Change in fair value during the period		(2,426	)		(23,033	)
Fair value of liability classified warrants exercised		(1,274	)		(1,689	)
Seneca liability classified warrants assumed		—			200
Expiration of equity classified warrant put feature		—			(26	)
Settlement of liability-classified warrants		—			(99	)
Fair value at end of period	$	61		$	2,651