CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 314,993	$ 869,191
Short-term investments	1,666,670	1,245,782
Contracts receivable	6,645	61,896
Inventories	20,645	24,806
Other current assets	143,173	143,374
Total current assets	2,152,126	2,345,049
Property, plant and equipment, net	180,806	178,069
Patents, net	29,605	29,005
Deposits and other assets	59,434	59,567
Total assets	2,421,971	2,611,690
Current liabilities:
Accounts payable	20,545	11,904
Accrued compensation	30,410	38,810
Accrued liabilities	128,002	88,560
Income taxes payable	16	36
Current portion of long-term obligations	4,970	3,526
Current portion of deferred contract revenue	99,511	97,714
Total current liabilities	283,454	240,550
Long-term deferred contract revenue	294,656	351,879
Long-term obligations, less current portion	25,107	26,378
Long-term mortgage debt	58,978	59,713
Total liabilities	1,827,610	1,839,953
Stockholders' equity:
Common stock, $0.001 par value; 300,000,000 shares authorized, 142,017,411 and 141,210,015 shares issued and outstanding at September 30, 2022 (unaudited) and December 31, 2021, respectively	142	141
Additional paid-in capital	2,034,554	1,964,167
Accumulated other comprehensive loss	(63,140)	(32,668)
Accumulated deficit	(1,377,195)	(1,159,903)
Total stockholders' equity	594,361	771,737
Total liabilities and stockholders' equity	2,421,971	2,611,690
0 Percent Convertible Senior Notes [Member]
Current liabilities:
Convertible senior notes, net	621,460	619,119
0.125 Percent Convertible Senior Notes [Member]
Current liabilities:
Convertible senior notes, net	$ 543,955	$ 542,314