Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2022

Fair Value Disclosures [Abstract]

Schedule of fair value measurements by level

The following tables summarize fair value measurements by level for assets and liabilities measured at fair value on a recurring basis as of the periods presented (in thousands):

	Balance as of March 31, 2022
	Level I		Level II		Level III		Total
Letter of credit (1)	$	306	$	—	$	—	$	306
Total assets	$	306	$	—	$	—	$	306
Contingent consideration (2)	$	—	$	—	$	144	$	144
Warrant liability (3)	—		—		45		45
Total liabilities	$	—	$	—	$	189	$	189

	Balance as of December 31, 2021
	Level I		Level II		Level III		Total
Letter of credit (1)	$	306	$	—	$	—	$	306
Total assets	$	306	$	—	$	—	$	306
Contingent consideration (2)	$	—	$	—	$	357	$	357
Total liabilities	$	—	$	—	$	357	$	357

___________________

(1)    $0.3 million was included in "Restricted cash - long term" on our condensed consolidated balance sheets as of March 31, 2022 and December 31, 2021. 

(2) Contingent consideration was included in "Other accrued liabilities" on our condensed consolidated balance sheets as of March 31, 2022 and December 31, 2021.

(3) Relates to Ticking Warrant issued on March 31, 2022 in connection with the Eight Amendment executed on March 8, 2022, as discussed in Notes 7 and 9 above, and included in "Other accrued liabilities" on our condensed consolidated balance sheet as of March 31, 2022.

Schedule of fair value measurements using significant Level III inputs

The fair value measurements using significant Level III inputs, and changes therein, was as follows (in thousands):

	Level III Contingent Consideration
Balance as of December 31, 2021	$	357
Settlement of contingent consideration	(213)
Balance as of March 31, 2022	$	144

	Level III Warrant Liabilities
Balance as of December 31, 2021	$	—
Warrant issued - Ticking Warrant	45
Balance as of March 31, 2022	$	45

Schedule of debt valuation assumptions

The assumptions used in the Black-Scholes option-pricing model at inception remain unchanged and were determined as follows:

Volatility	98.01	%
Risk-free interest rate	1.58	%
Expected life (in years)	7
Dividend yield	0 %

The assumptions used in the Black-Scholes warrant-pricing model were determined as follows:

	March 31, 2022
Volatility	100.0	%
Risk-free interest rate	2.45	%
Weighted average expected life (in years)	4.55
Dividend yield	0	%