CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 271,013	$ 281,263
Marketable securities	28,335	49,787
Accounts and other receivables, net	3,015	805
Prepaid expenses and other current assets	11,089	9,039
Inventory	4,257	3,906
Total current assets	317,709	344,800
Property and equipment, net	6,677	5,251
Operating lease right-of-use assets	4,711	4,983
Restricted cash	150	150
Total assets	329,247	355,184
Current liabilities:
Accounts payable	7,082	6,504
Accrued expenses	15,940	17,521
Deferred revenue	38,377	38,592
Other current liabilities	1,181	646
Total current liabilities	62,580	63,263
Deferred revenue - noncurrent	12,109	20,692
Operating lease liabilities - noncurrent	4,624	4,906
Total liabilities	79,313	88,861
Contingencies (Note 12)
Stockholders' equity:
Preferred stock, $.001 par value, 5,000,000 shares authorized, no shares issued and outstanding	0	0
Common stock, $.001 par value, 300,000,000 shares authorized at March 31, 2024 and December 31, 2023; 49,885,701 and 49,043,074 shares issued and outstanding at March 31, 2024 and December 31, 2023, respectively	50	49
Additional paid-in capital	1,020,478	1,007,556
Accumulated deficit	(771,430)	(742,146)
Accumulated other comprehensive income	836	864
Total stockholders' equity	249,934	266,323
Total liabilities and stockholders' equity	$ 329,247	$ 355,184