Consolidated statements of cash flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities:
Net income (loss)	$ (207,043)	$ (92,534)	$ (58,351)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	10,969	10,624	10,251
Accrued interest	(95)	(2,216)	(94)
Asset write-downs and impairment of field equipment	493	955	649
Share-based compensation	115,608	106,955	94,900
Foreign currency remeasurement loss (gain)	161	(3,256)	3,231
Decrease (increase) in accounts receivables and prepaid expenses	(29,414)	(2,547)	(5,270)
Amortization of discount (premium)	(23,084)	(1,536)	3,101
Decrease (increase) in inventories	(8,919)	(4,342)	2,483
Decrease (increase) in other long-term assets	4,072	7,107	4,519
Increase (decrease) in accounts payables and accrued expenses	14,869	14,257	27,777
Increase (decrease) in other long-term liabilities	(9,781)	(7,773)	(10,980)
Net cash provided by (used in) operating activities	(73,336)	30,788	82,756
Cash flows from investing activities:
Purchase of property, equipment and field equipment	(27,093)	(21,358)	(24,170)
Proceeds from maturity of short-term investments	1,214,982	1,179,289	958,000
Purchase of short-term investments	(1,003,741)	(1,297,888)	(1,078,664)
Net cash provided by (used in) investing activities	184,148	(139,957)	(144,834)
Cash flows from financing activities:
Proceeds from issuance of shares, net	4,416	5,224	4,546
Repayment of long-term debt	(10)	(28)	(26)
Exercise of options	11,381	10,295	21,182
Net cash provided by (used in) financing activities	15,787	15,491	25,702
Effect of exchange rate changes on cash, cash equivalents and restricted cash	131	(97)	(188)
Increase (decrease) in cash, cash equivalents and restricted cash	126,730	(93,775)	(36,564)
Cash, cash equivalents and restricted cash at the beginning of the year	115,834	209,609	246,173
Cash, cash equivalents and restricted cash at the end of the year	242,564	115,834	209,609
Cash paid during the year for:
Income taxes paid (refunded), net	13,665	5,480	3,110
Interest paid	6	41	101
Reconciliation of cash, cash equivalents and restricted cash:
Cash and cash equivalents	240,821	115,326	208,802
Restricted cash	1,743	508	807
Total cash, cash equivalents and restricted cash	242,564	115,834	209,609
Non-cash activities:
Right-of-use assets obtained in exchange for lease liabilities	18,063	12,117	5,387
Purchase of property incurred but unpaid at period end	$ 1,714	$ 0	$ 0