Consolidated statements of cash flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities:
Net income (loss)	$ (92,534)	$ (58,351)	$ 19,808
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	10,624	10,251	9,150
Accrued interest	(2,216)	(94)	0
Asset write-downs and impairment of field equipment	955	649	429
Share-based compensation	106,955	94,900	75,721
Foreign currency remeasurement loss (gain)	(3,256)	3,231	(699)
Decrease (increase) in accounts receivables	2,547	5,270	(30,354)
Amortization of discount (premium)	(1,536)	3,101	3,260
Decrease (increase) in inventories	(4,342)	2,483	(2,935)
Decrease (increase) in other long-term assets	7,107	4,519	(1,366)
Increase (decrease) in accounts payables and accrued expenses	14,257	27,777	25,470
Increase (decrease) in other long-term liabilities	(7,773)	(10,980)	664
Net cash provided by (used in) operating activities	30,788	82,756	99,148
Cash flows from investing activities:
Purchase of property, equipment and field equipment	(21,358)	(24,170)	(14,968)
Proceeds from maturity of short-term investments	1,179,289	958,000	150,000
Purchase of short-term investments	(1,297,888)	(1,078,664)	(607,879)
Net cash provided by (used in) investing activities	(139,957)	(144,834)	(472,847)
Cash flows from financing activities:
Proceeds from issuance of shares, net	5,224	4,546	3,370
Proceeds from convertible note, net	0	0	558,439
Repayment of long-term debt	(28)	(26)	(150,028)
Exercise of options	10,295	21,182	28,428
Net cash provided by (used in) financing activities	15,491	25,702	440,209
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(97)	(188)	247
Increase (decrease) in cash, cash equivalents and restricted cash	(93,775)	(36,564)	66,757
Cash, cash equivalents and restricted cash at the beginning of the year	209,609	246,173	179,416
Cash, cash equivalents and restricted cash at the end of the year	115,834	209,609	246,173
Cash paid during the year for:
Income taxes paid (refunded), net	5,480	3,110	(3,261)
Interest paid	41	101	8,686
Non-cash activities:
Right-of-use assets obtained in exchange for lease liabilities	$ 12,117	$ 5,387	$ 5,617