Supplemental Balance Sheet Information

12 Months Ended

Dec. 31, 2022

Balance Sheet Related Disclosures [Abstract]

5. Supplemental Balance Sheet Information

Prepaid Expenses and Other Current Assets

Prepaid expenses and other current assets consisted of the following:


	December 31,
	2022		2021
Prepaid research and development expenses	$	4,509	$	4,496
Tax incentive refund, net of reserve		269		2,697
Prepaid insurance		999		112
Prepaid compensation benefits		327		575
Other current assets		1,008		1,698
Prepaid expenses and other current assets	$	7,112	$	9,578

Property and Equipment, Net

Property and equipment, net consisted of the following:


	December 31,
	2022			2021
Laboratory and office equipment	$	5,967		$	6,162
Leasehold improvements		629			1,635
Computer equipment		102			149
		6,698			7,946
Less: Accumulated depreciation and amortization		(3,804	)		(3,820	)
Property and equipment, net	$	2,894		$	4,126

Depreciation and amortization expense for the years ended December 31, 2022 and 2021 was $1,440 and $1,399, respectively.

Restricted Cash

As of December 31, 2022 and 2021, the Company had restricted cash as presented in the table below, which consists of cash used to secure letters of credit for the benefit of the landlord in connection with the Company’s lease agreements. The cash will be restricted until the termination or modification of the lease arrangement.


	December 31,
	2022		2021
Restricted cash	$	283	$	—
Restricted cash, net of current portion		—		492

Accrued Expenses

Accrued expenses consisted of the following:


	December 31,
	2022		2021
Research and development expenses	$	6,122	$	8,882
Compensation and benefit costs		4,175		5,579
Consulting and professional fees		1,224		999
Other liabilities		211		178
	$	11,732	$	15,638