Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 109,985	$ 142,072
Accounts receivable, net	5,297	2,560
Inventory	6,064	3,880
Prepaid expenses and other current assets	3,066	2,585
Total current assets	124,412	151,097
Property and equipment, net	1,747	1,425
Operating lease right-of-use asset	391	0
Other non-current assets	26	26
Total assets	126,576	152,548
Current liabilities:
Accounts payable	1,276	510
Accrued expenses	6,120	5,398
Total current liabilities	7,396	5,908
Operating lease liability, non-current portion	175	0
Other long-term liabilities	761	681
Total liabilities	8,332	6,589
Commitments and contingencies (Notes 5 and 10)
Stockholders' equity:
Common stock, $0.01 par value, 200,000,000 authorized as of September 30, 2022 and December 31, 2021; 20,578,963 and 20,399,337 shares issued and outstanding as of September 30, 2022 and December 31, 2021, respectively	206	204
Additional paid-in capital	543,903	540,707
Accumulated deficit	(425,646)	(394,754)
Accumulated other comprehensive loss	(219)	(198)
Total stockholders' equity	118,244	145,959
Total liabilities and stockholders' equity	$ 126,576	$ 152,548