Balance Sheets Details

12 Months Ended

Dec. 31, 2022

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Balance Sheet Details

Prepaid Expenses and Other Current Assets

Prepaid expenses and other current assets consist of the following as of December 31, (in thousands):


	2022		2021
Tax receivable	$	1,506	$	104
Prepaid R&D costs		1,476		2,467
Prepaid insurance and service contracts		1,424		1,860
Interest receivable - marketable debt securities		168		—
Other		319		230
Total	$	4,893	$	4,661

Property and Equipment, Net

Property and equipment, net, consist of the following as of December 31, (in thousands):


	2022			2021
Laboratory equipment	$	7,559		$	6,851
Computers, software and office equipment		512			489
Leasehold improvements		467			384
Office furniture and fixtures		123			126
		8,661			7,850
Accumulated depreciation and amortization		(5,617	)		(4,866	)
Total	$	3,044		$	2,984

Depreciation and amortization expense for property and equipment for the years ended December 31, 2022 and 2021 was $0.8 million and $0.6 million, respectively.

Accrued Liabilities

Accrued liabilities consist of the following as of December 31, (in thousands):


	2022		2021
Accrued R&D costs(1)	$	4,069	$	9,043
Accrued compensation		3,494		3,664
Accrued audit, tax and filing fees		1,703		556
Accrued directors and officers insurance premium financing obligation(2)		926		—
Accrued other		1,122		862
Total	$	11,314	$	14,125

__________

(1)

Includes $99 and $250 of accrued R&D costs due to related parties as of December 31, 2022 and 2021, respectively.

(2)

Represents the remaining balance due under the Company’s insurance premium financing agreement, which is payable in equal monthly installments through May 2023 and bears interest at approximately 3.4% per annum.