Condensed Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 188,572	$ 201,049
Short-term investments	127,402	138,174
Inventory	6,329	3,011
Prepaid expenses and other current assets	3,486	5,526
Total current assets	325,789	347,760
Right-of-use lease assets	5,749	0
Property and equipment, net	6,714	6,072
Restricted cash	1,734	687
Other noncurrent assets	2,125	1,129
Total assets	342,111	355,648
Current liabilities:
Accounts payable	3,525	2,348
Accrued expenses	2,911	4,278
Lease liabilities, current	2,646	0
Other current liabilities	0	118
Total current liabilities	9,082	6,744
Long-term debt, net of issuance costs	9,941	9,904
Lease liabilities, non current	3,878	0
Other noncurrent liabilities	1,728	2,827
Total liabilities	24,629	19,475
Commitments and contingencies (Note 9)
Stockholders' equity:
Common stock, $0.0001 par value; 400,000,000 and 60,272,685 shares authorized, 70,509,463 and 72,438,742 of shares outstanding at March 31, 2022 and December 31, 2021, respectively	7	7
Additional paid-in capital	492,144	488,200
Accumulated other comprehensive loss	(767)	(138)
Accumulated deficit	(173,902)	(151,896)
Total stockholders' equity	317,482	336,173
Total liabilities and stockholders' equity	342,111	355,648
Series A Common Stock Equivalent Convertible Preferred Stock [Member]
Stockholders' equity:
Series A Common Stock Equivalent Convertible Preferred Stock, $0.0001 par value; 7,000 shares authorized, 2,500 and 0 of shares issued and outstanding at March 31, 2022 and December 31, 2021, respectively	$ 0	$ 0