Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 66,239	$ 149,103
Prepaid expenses and other current assets	10,596	10,499
Total current assets	76,835	159,602
Restricted cash	2,637	2,637
Deferred lease asset	643	667
Property, plant and equipment, net	61,011	50,610
Other non-current assets	1,206	440
Total assets	142,332	213,956
Current liabilities
Accounts payable	23,967	21,763
Accrued expenses and other current liabilities	18,986	29,983
Total current liabilities	42,953	51,746
Build-to-suit lease liability	25,609	25,900
Term loan, net	37,580	37,192
Other non-current liabilities	3,480	3,735
Total liabilities	109,622	118,573
Commitments and contingencies - Note 9
Stockholders' equity
Preferred stock, $0.00001 par value per share; 10,000,000 shares authorized and no shares issued and outstanding as of June 30, 2022 and December 31, 2021
Common stock, $0.00001 par value per share; 200,000,000 shares authorized and 41,020,086 and 38,473,945 issued and outstanding as of June 30, 2022 and December 31, 2021, respectively	1
Additional paid-in capital	352,342	331,032
Accumulated deficit	(319,633)	(235,649)
Total stockholders’ equity	32,710	95,383
Total liabilities and stockholders' equity	$ 142,332	$ 213,956