Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2021

Accounting Policies [Abstract]

Assets and Liabilities Measured at Fair Value on Recurring Basis

The following table presents information related to the Company’s assets measured at fair value on a recurring basis as of December 31, 2021 (in thousands):

	December 31, 2021
	Level 1		Level 2		Level 3		Total
Cash equivalents:
Money market funds	$	140,010		—		—	$	140,010
Total cash equivalents	$	140,010		—		—	$	140,010

There were no assets measured at fair value on a recurring basis as of December 31, 2020.

The following table presents information related to the Company’s liabilities measured at fair value on a recurring basis as of December 31, 2021 and December 31, 2020 (in thousands):

	December 31, 2021
	Level 1		Level 2		Level 3		Total
Liability classified equity award	$	—		—		2,052	$	2,052
	December 31, 2020
	Level 1		Level 2		Level 3		Total
Liability classified equity award (1)	$	—		—		4,108	$	4,108
Foreign currency forward contract		—		878		—		878
Total	$	—		878		4,108	$	4,986

_{(1) A portion of this award is being accreted over the requisite service period. The amount in the above table includes the fair value of the vested and unvested portion of the award.}

Reconciliation of Liabilities Measured at Fair Value Using Significant Unobservable Inputs

The following table provides a reconciliation of liabilities measured at fair value using significant unobservable inputs (Level 3) as of December 31, 2021 and 2020 (in thousands):

	Level 3 Liabilities
Balance at December 31, 2019	$	266
Straight-line recognition of liability classified equity award		371
Change in fair value measurement		1,031
Balance at December 31, 2020	$	1,668
Straight-line recognition of liability classified equity award		1,028
Change in fair value measurement		(644	)
Balance at December 31, 2021	$	2,052

Opening and Closing Balances of Company's Contract Liability

The opening and closing balances of the Company’s contract liability are as follows:

Balance at January 1, 2021	$	—
Contract liability assumed in acquisition of EOS		21,196
Payments received		11,590
Revenue recognized		(14,635	)
Balance at December 31, 2021	$	18,151

Computation of Basic and Diluted Loss Per Share

The following table sets forth the computation of basic and diluted loss per share (in thousands, except per share data):

	Year Ended December 31,
	2021			2020
Numerator:
Net loss	$	(144,326	)	$	(78,994	)
Denominator:
Weighted average common shares outstanding		96,197			67,020
Net loss per share, basic and diluted	$	(1.50	)	$	(1.18	)

Anti-Dilutive Securities of Common Stock Excluded from Calculation of Diluted Net Loss Per Share

The following potentially dilutive shares of common stock were excluded from the calculation of diluted net loss per share because their effect would have been anti-dilutive for the years presented (in thousands):

	Year Ended December 31,
	2021		2020
Series A convertible preferred stock		29		29
Options to purchase common stock and employee stock purchase plan		3,416		3,951
Unvested restricted stock units		8,703		8,216
Warrants to purchase common stock		20,184		24,881
Senior convertible notes		17,246		—
		49,578		37,077