Balance Sheet Items (Tables)

3 Months Ended

Mar. 31, 2022

Balance Sheet Related Disclosures [Abstract]

Schedule of Other Receivables

Other receivables consisted of the following as of March 31, 2022 and December 31, 2021, respectively (in thousands):

	March 31, 2022		December 31, 2021
Patent cost reimbursements	$	3,377	$	4,702
Accrued interest on marketable securities		436		226
Other		356		555
Total	$	4,169	$	5,483

Schedule of Prepaid Expenses and Other Current Assets

Prepaid expenses and other current assets consisted of the following as of March 31, 2022 and December 31, 2021, respectively (in thousands):

	March 31, 2022		December 31, 2021
Prepaid contract manufacturing and clinical costs	$	4,704	$	2,714
Prepaid insurance		1,086		1,897
Prepaid income taxes		1,486		1,486
Prepaid rent		—		468
Other		966		671
Total	$	8,242	$	7,236

Schedule of Property and Equipment

Property and equipment, net, consisted of the following as of March 31, 2022 and December 31, 2021, respectively (in thousands):

	March 31, 2022			December 31, 2021
Lab equipment	$	8,004		$	6,848
Leasehold improvements		1,701			1,701
Computer equipment		477			273
Furniture and equipment		133			133
Construction in progress		86			9
Total property and equipment, gross		10,401			8,964
Less: accumulated depreciation and amortization		(4,385	)		(4,077	)
Property and equipment, net	$	6,016		$	4,887

Summary of Accrued Expenses and Other Current Liabilities

Accrued expenses and other current liabilities consisted of the following as of March 31, 2022 and December 31, 2021, respectively (in thousands):

	March 31, 2022		December 31, 2021
Accrued employee compensation and related expenses	$	2,479	$	4,225
Accrued research and development expenses		4,149		4,065
Accrued patent expenses		3,180		3,213
Accrued sublicensing fees		582		586
Credit card liability		—		259
Other		800		788
Total	$	11,190	$	13,136