CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
CURRENT ASSETS:
Cash and cash equivalents	$ 84,587	$ 99,780
Short-term investments	104,664	119,854
Restricted cash	1,536	267
Trade receivables	11,825	6,339
Receivables and prepaid expenses	14,899	10,084
Inventories	25,949	25,549
Total current assets	243,460	261,873
LONG-TERM ASSETS:
Property and equipment, net	10,039	9,812
Field equipment, net	9,278	8,808
Severance pay fund	95	88
Other long-term assets	1,756	1,500
Total long-term assets	21,168	20,208
TOTAL ASSETS	264,628	282,081
CURRENT LIABILITIES:
Trade payables	14,799	18,356
Other payables and accrued expenses	17,116	18,526
Total current liabilities	31,915	36,882
LONG-TERM LIABILITIES:
Long-term loan, net of discount and issuance costs	96,492	96,231
Employee benefit liabilities	2,756	2,590
Other long-term liabilities	4,565	4,033
Total long-term liabilities	103,813	102,854
TOTAL LIABILITIES	135,728	139,736
COMMITMENTS AND CONTINGENCIES	0	0
SHAREHOLDERS' EQUITY:
Ordinary shares no par value, unlimited shares authorized; issued and outstanding: 88,133,366 shares and 87,066,446 shares at March 31, 2017 (unaudited) and December 31, 2016, respectively	0	0
Additional paid-in capital	669,462	664,154
Accumulated other comprehensive loss	(1,921)	(1,883)
Accumulated deficit	(538,641)	(519,926)
Total shareholders' equity	128,900	142,345
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 264,628	$ 282,081