CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Current assets:
Cash and cash equivalents	$ 71,143	$ 99,704
Marketable securities	184,590	271,209
Accounts and other receivables, net	625	607
Prepaid expenses and other current assets	6,215	9,481
Inventory	2,678	2,305
Total current assets	265,251	383,306
Property and equipment, net	8,762	8,177
Operating lease right-of-use assets	21,089	21,000
Restricted cash	150	150
Other assets	5,895	5,832
Total assets	301,147	418,465
Current liabilities:
Accounts payable	19,685	11,721
Accrued expenses	11,478	18,103
Deferred revenue	0	17,784
Other current liabilities	2,012	1,440
Total current liabilities	33,175	49,048
Deferred revenue - noncurrent	0	10,853
Operating lease liabilities - noncurrent	21,815	21,858
Other noncurrent liabilities	148	205
Total liabilities	55,138	81,964
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 June 30, 2025 and December 31, 2024; 68,889,649 and 68,266,005 shares issued and outstanding at June 30, 2025 and December 31, 2024, respectively	69	68
Additional paid-in capital	1,222,745	1,208,421
Accumulated deficit	(977,637)	(873,016)
Accumulated other comprehensive income (loss)	832	1,028
Total stockholders' equity	246,009	336,501
Total liabilities and stockholders' equity	$ 301,147	$ 418,465