Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 63,425	$ 87,880
Prepaid expenses and other current assets	8,933	8,537
Total current assets	72,358	96,417
Restricted cash	2,637	2,637
Property, plant and equipment, net	14,642	14,963
Operating lease right-of-use assets	10,647	10,943
Other non-current assets	1,316	1,316
Total assets	101,600	126,276
Current liabilities
Accounts payable	9,002	10,946
Accrued expenses and other current liabilities	16,602	18,287
Deferred revenue	28,851	33,557
Total current liabilities	54,455	62,790
Term loan, net	38,161	37,967
Operating lease liability, net of current portion	19,928	20,440
Other non-current liabilities	4,004	4,130
Total liabilities	116,548	125,327
Commitments and contingencies - Note 11
Stockholders' (deficit) equity
Preferred stock, $0.00001 par value per share; 10,000,000 shares authorized and no shares issued and outstanding as of March 31, 2023 and December 31, 2022
Common stock, $0.00001 par value per share; 200,000,000 shares authorized and 63,473,349 and 63,207,507 issued and outstanding as of March 31, 2023 and December 31, 2022, respectively	1	1
Additional paid-in capital	404,114	402,389
Accumulated deficit	(419,063)	(401,441)
Total stockholders' (deficit) equity	(14,948)	949
Total liabilities and stockholders' (deficit) equity	$ 101,600	$ 126,276