Fair value of non-marketable equity securities is determined using alternative pricing sources and models utilizing market observable inputs. The Company reports the restricted equity securities as non-marketable equity securities on the balance sheet and determines current or non-current classification based on the expected duration of the restriction.

The carrying value is measured as the total initial cost, less the cumulative net unrealized loss. The following table summarizes the value of non-marketable equity securities using the measurement alternative (in thousands):


	December 31, 2023			December 31, 2022
Initial cost	$	1,759		$	1,759
Cumulative net fair value loss		(1,748	)		(1,701	)
Carrying value of non-marketable equity securities	$	11		$	58