Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 209,693	$ 233,437
Prepaid expenses and other current assets	12,507	11,045
Total current assets	222,200	244,482
Operating lease right-of-use assets	188	210
Property and equipment, net	20,863	20,616
Intangible assets, net	940	1,075
Other assets		399
Total assets	244,191	266,782
Current liabilities:
Accounts payable	3,332	7,126
Accrued development expense	2,925	2,803
Accrued compensation and benefits	172	1,877
Operating lease liabilities, current	99	97
Other current liabilities	261	631
Total current liabilities	6,789	12,534
Operating lease liabilities, non-current	114	139
Other non-current liabilities	194	194
Total liabilities	7,097	12,867
Commitments and contingencies (Notes 9, 10 and 12)
Stockholders' equity:
Preferred stock, $0.001 par value; 10,000,000 shares authorized, none issued and outstanding
Common stock, $0.001 par value; 120,000,000 shares authorized; 40,031,280 and 40,016,792 shares issued and outstanding at March 31, 2022 and December 31, 2021, respectively	40	40
Additional paid-in capital	461,887	461,181
Accumulated deficit	(224,833)	(207,306)
Total stockholders' equity	237,094	253,915
Total liabilities and stockholders' equity	$ 244,191	$ 266,782

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).