CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
CURRENT ASSETS:
Cash and cash equivalents	$ 689,837	$ 234,674
Short-term investments	243,948	607,902
Restricted cash	855	11,499
Trade receivables, net	94,129	96,699
Receivables and prepaid expenses	17,595	21,245
Inventories	22,642	27,422
Total current assets	1,069,006	999,441
LONG-TERM ASSETS:
Property and equipment, net	11,699	11,395
Field equipment, net	12,553	11,230
Right-of-use assets	16,460	19,009
Other long-term assets	10,735	10,908
Total long-term assets	51,447	52,542
TOTAL ASSETS	1,120,453	1,051,983
CURRENT LIABILITIES:
Trade payables	60,005	53,647
Other payables, lease liabilities and accrued expenses	64,544	59,965
Total current liabilities	124,549	113,612
LONG-TERM LIABILITIES:
Long-term debt, net	561,388	429,905
Deferred revenue	7,464	12,139
Long-term leases	11,478	14,293
Employee benefits	2,031	5,171
Other long-term liabilities	379	337
Total long-term liabilities	582,740	461,845
TOTAL LIABILITIES	707,289	575,457
COMMITMENTS AND CONTINGENCIES
SHAREHOLDERS' EQUITY:
Ordinary shares no par value, unlimited shares authorized; issued and outstanding: 103,817,566 shares and 102,334,276 shares at September 30, 2021 (unaudited) and December 31, 2020, respectively	0	0
Additional paid-in capital	1,073,532	1,111,435
Accumulated other comprehensive income (loss)	(900)	(3,832)
Retained earnings (accumulated deficit)	(659,468)	(631,077)
TOTAL SHAREHOLDERS' EQUITY	413,164	476,526
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 1,120,453	$ 1,051,983