Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 78,592	$ 99,780
Short-term investments	104,719	119,854
Restricted cash	2,126	267
Trade receivables, net	29,567	6,339
Receivables and prepaid expenses	8,105	10,084
Inventories	22,025	25,549
Total current assets	245,134	261,873
Long-term assets:
Property and equipment, net	9,031	9,812
Field equipment, net	9,036	8,808
Severance pay fund	111	88
Other long-term assets	1,986	1,500
Total long-term assets	20,164	20,208
Total assets	265,298	282,081
Current liabilities:
Trade payables	17,206	18,356
Other payables and accrued expenses	32,996	18,526
Total current liabilities	50,202	36,882
Long-term liabilities:
Long-term loan, net of discount and issuance costs	97,342	96,231
Employee benefit liabilities	2,453	2,590
Other long-term liabilities	1,737	4,033
Total long-term liabilities	101,532	102,854
Total liabilities	151,734	139,736
Commitments and contingencies	0	0
Shareholders’ equity:
Ordinary shares - No par value, Unlimited shares authorized; Issued and outstanding: 89,478,032 shares and 87,066,446 shares at December 31, 2017 and December 31, 2016 respectively;	0	0
Additional paid-in capital	697,165	664,154
Accumulated other comprehensive loss	(1,343)	(1,883)
Accumulated deficit	(582,258)	(519,926)
Total shareholders’ equity	113,564	142,345
Total liabilities and shareholders’ equity	$ 265,298	$ 282,081