Supplemental Balance Sheet Information

3 Months Ended

Mar. 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:

	March 31, 2022		December 31, 2021
Prepaid research and development expenses	$	4,521	$	4,496
Tax incentive refund		2,844		2,697
Prepaid insurance		570		112
Prepaid compensation benefits		518		575
Other current assets		805		1,698
	$	9,258	$	9,578

Property and equipment, net

Property and equipment, net consisted of the following:

	March 31, 2022			December 31, 2021
Laboratory and office equipment	$	6,302		$	6,162
Leasehold improvements		1,635			1,635
Computer equipment		149			149
		8,086			7,946
Less: Accumulated depreciation and amortization		(4,219	)		(3,820	)
Property and equipment, net	$	3,867		$	4,126

Depreciation and amortization expense was $399 and $291, respectively, for the three months ended March 31, 2022 and 2021.

Restricted cash

As of March 31, 2022 and December 31, 2021, the Company had restricted cash of $492, 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.

Accrued expenses and other current liabilities

Accrued expenses and other current liabilities consisted of the following:

	March 31, 2022		December 31, 2021
Research and development expenses	$	7,396	$	8,882
Compensation and benefit costs		4,325		5,579
Consulting and professional fees		978		999
Other liabilities		180		178
	$	12,879	$	15,638