CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
CURRENT ASSETS:
Cash and cash equivalents	$ 180,073	$ 140,622
Short-term investments	104,511	105,256
Restricted cash	2,110	2,134
Trade receivables	42,533	36,523
Receivables and prepaid expenses	15,302	14,279
Inventories	25,454	22,555
Total current assets	369,983	321,369
LONG-TERM ASSETS:
Property and equipment, net	8,399	8,442
Field equipment, net	7,466	6,924
Right-of-use assets, net	14,659	0
Other long-term assets	5,682	3,058
Total long-term assets	36,206	18,424
TOTAL ASSETS	406,189	339,793
CURRENT LIABILITIES:
Trade payables	30,069	26,708
Other payables, lease liabilities and accrued expenses	43,498	37,852
Total current liabilities	73,567	64,560
LONG-TERM LIABILITIES:
Long-term loan, net of discount and issuance costs	149,344	149,268
Deferred revenue	8,874	9,929
Employee benefit liabilities	3,610	2,683
Long-term lease liabilities	11,582	0
Other long-term liabilities	306	1,094
Total long-term liabilities	173,716	162,974
TOTAL LIABILITIES	247,283	227,534
COMMITMENTS AND CONTINGENCIES	0	0
SHAREHOLDERS' EQUITY:
Ordinary shares no par value, unlimited shares authorized; issued and outstanding: 97,858,876 shares and 93,254,185 shares at June 30, 2019 (unaudited) and December 31, 2018, respectively	0	0
Additional paid-in capital	818,338	757,314
Accumulated other comprehensive income (loss)	(2,357)	(1,400)
Retained earnings (accumulated deficit)	(657,075)	(643,655)
Total shareholders' equity	158,906	112,259
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 406,189	$ 339,793