Debt (Tables)

12 Months Ended

Dec. 31, 2022

Debt Disclosure [Abstract]

Summary of Calculated Aggregate Fair Values and Assumptions

The following table sets forth the assumptions used and calculated aggregated fair values of the liability classified warrants:

	December 31, 2022			December 31, 2021
Strike price per share	$	1.42		$	2.25
Closing price per share	$	0.77		$	2.63
Term (years)	0.53			1.53
Volatility	102		%	186		%
Risk-free rate	4.70		%	0.56		%
Dividend Yield	—			—

Summary of Outstanding Warrants

A summary of the change in fair value of the warrant liability is set forth below:

	2022		2021
Balance, beginning of year	$	3,605	$	1,614
Warrant issued	—		—
Warrant Exercised	—		(16,148)
Change in fair value of warrant liability	(3,349)		18,139
Balance, end of year	$	256	$	3,605

A summary of our outstanding warrants is set forth below:

	December 31, 2022			December 31, 2021
Warrant Type	Cash Exercise Price per share		Number of warrants	Cash Exercise Price per share		Number of warrants
2020 Convertible Notes warrant	$	1.42	2,811,315	$	2.25	1,780,000
Common stock warrant (Series D-1)	$	—	—	$	2.25	35,555
Common stock warrants (Series F)	$	9.22	377,402	$	9.22	377,402
Public Warrants (PHUNW)	$	11.50	1,761,291	$	11.50	1,761,291
Private Placement Warrants	$	11.50	1,658,381	$	11.50	1,658,381
Unit Purchase Option Warrants	$	11.50	24,172	$	11.50	24,172
Total			6,632,561			5,636,801

Summary of Interest Expense

The following table sets forth interest expense for our various debt obligations included in the consolidated statements of operations and comprehensive loss:

	Year Ended December 31,
	2022		2021
2022 Promissory Note	$	903	$	—
2021 Promissory Note	318		203
2020 Convertible Notes	—		1,111
Accretion of debt discount - issuance costs	1,034		1,913
Accretion of debt discount - warrants	—		1,029
All other debt and financing obligations	151		225
Total	$	2,406	$	4,481