Consolidated statements of cash flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Cash flows from operating activities:
Net income (loss)	$ (168,627)	$ (207,043)	$ (92,534)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	11,235	10,969	10,624
Accrued interest	(651)	(95)	(2,216)
Asset write-downs and impairment of field equipment	1,159	493	955
Share-based compensation	160,035	115,608	106,955
Foreign currency remeasurement loss (gain)	(227)	161	(3,256)
Decrease (increase) in accounts receivables and prepaid expenses	(26,358)	29,414	2,547
Amortization of discount (premium)	(25,644)	(23,084)	(1,536)
Decrease (increase) in inventories	2,568	(8,919)	(4,342)
Decrease (increase) in other long-term assets	7,395	4,072	7,107
Increase (decrease) in accounts payables and accrued expenses	19,106	14,869	14,257
Increase (decrease) in other long-term liabilities	(6,360)	(9,781)	(7,773)
Net cash provided by (used in) operating activities	(26,369)	(73,336)	30,788
Cash flows from investing activities:
Purchase of property, equipment and field equipment	(42,855)	(27,093)	(21,358)
Proceeds from maturity of short-term investments	778,000	1,214,982	1,179,289
Purchase of short-term investments	(875,387)	(1,003,741)	(1,297,888)
Net cash provided by (used in) investing activities	(140,242)	184,148	(139,957)
Cash flows from financing activities:
Proceeds from issuance of shares, net	4,150	4,416	5,224
Proceeds from senior secured credit facility, net	96,922	0	0
Repayment and redemption of long-term debt	(12,913)	(10)	(28)
Exercise of options	2,156	11,381	10,295
Net cash provided by (used in) financing activities	90,315	15,787	15,491
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(174)	131	(97)
Increase (decrease) in cash, cash equivalents and restricted cash	(76,470)	126,730	(93,775)
Cash, cash equivalents and restricted cash at the beginning of the year	242,564	115,834	209,609
Cash, cash equivalents and restricted cash at the end of the year	166,094	242,564	115,834
Cash paid during the year for:
Income taxes paid (refunded), net	23,463	13,665	5,480
Interest paid	7,714	6	41
Reconciliation of cash, cash equivalents and restricted cash:
Cash and cash equivalents	163,767	240,821	115,326
Restricted cash	2,327	1,743	508
Total cash, cash equivalents and restricted cash	166,094	242,564	115,834
Non-cash activities:
Right-of-use assets obtained in exchange for lease liabilities	494	18,063	12,117
Purchase of property incurred but unpaid at period end	$ 1,619	$ 1,714	$ 0