Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash flows from operating activities:
Net loss	$ (22,563)	$ (16,156)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation expense	1,499	1,195
Non-cash interest expense related to note payable	214
Stock-based compensation	1,147	984
Changes in current assets and liabilities:
Prepaid expenses and other assets	(1,180)	(662)
Prepaid rent		(1,444)
Right-of-use assets and lease liabilities, net	(62)	(31)
Accounts payable	495	824
Accrued expense and other liabilities	737	(2,796)
Deferred revenue	(3,874)	(2,038)
Net cash used in operating activities	(23,587)	(20,124)
Cash flows from investing activities:
Purchases of property and equipment	(838)	(531)
Net cash used in investing activities	(838)	(531)
Cash flows from financing activities:
Proceeds from exercise of stock options		88
Net cash provided by financing activities		88
Net decrease in cash, cash equivalents and restricted cash	(24,425)	(20,567)
Cash, cash equivalents, and restricted cash - beginning of period	125,064	166,436
Cash, cash equivalents, and restricted cash - end of period	100,639	145,869
Summary of cash, cash equivalents and restricted cash reported within the consolidated balance sheets:
Cash and cash equivalents	95,608	140,838
Restricted cash	5,031	5,031
Total cash, cash equivalents, and restricted cash	100,639	145,869
Supplemental disclosure of cash flow information:
Cash paid for interest	743
Supplemental disclosure of non-cash investing and financing activities:
Purchase of property and equipment in accounts payable and accrued liabilities	$ 24	$ 416