SHARE- BASED COMPENSATION (Tables)

12 Months Ended

Dec. 31, 2017

Disclosure of terms and conditions of share-based payment arrangement [line items]

Schedule of Expense Recognized in Financial Statements

The expense recognized in the Company's financial statements for services provided by employees and service-providers is as follows:

	Year ended December 31,
	2017		2016		2015

Share-based compensation	$	2,244	$	2,943	$	4,365

Schedule of Number of Share Options

The following table summarizes the number of share options, the weighted average exercise price, and the changes that were made in the option plans to employees, consultants and directors:

	2017					2016					2015
	Number of options			Weighted average exercise prices ($)		Number of options			Weighted average exercise prices ($)		Number of options			Weighted average exercise prices ($)

Outstanding at January 1		4,439,884			9.50		4,970,028			9.65		3,770,762			9.75

Grants		1,537,250			5.08		377,500			6.94		1,455,250			8.90

Exercised		(269,738	)		2.18		(76,447	)		2.45		(53,408	)		5.58

Forfeited		(601,096	)		10.22		(831,197	)		9.87		(202,576	)		7.15

Outstanding at December 31		5,106,300			8.47		4,439,884			9.50		4,970,028			9.65
Exercisable at December 31		3,146,823			10.73		3,203,850			9.18		2,794,672			8.79

Schedule of Share Options Outstanding

The following table summarizes information about share options outstanding at December 31, 2017:

	Options outstanding
Range of exercise prices ($)	Number outstanding		Average remaining contractual life		Weighted average exercise price
2.64 – 4.95		724,437		9.36		4.81
5.19 – 6.65		1,068,000		7.71		5.60
6.81 – 7.85		1,059,270		4.72		7.33
8.09 – 9.78		951,365		6.69		9.19
10.03 – 13.70		1,142,728		5.90		12.50
17.65 – 20.39		160,500		6.36		18.75

Total		5,106,300		6.69		8.47

Schedule of Assumptions Used to Value Options

The fair value of the Company's share options granted to employees, directors and consultants for the years ended December 31, 2017, 2016 and 2015 was estimated using the binomial model with the following assumptions:

	2017		2016		2015

Dividend yield (%)		-		-		-
Expected volatility of the share prices (%)		42-43		45-54		48-51
Risk-free interest rate (%)		1.89-2.42		1.87-2.35		1.8-2.7
Suboptimal factor		1.8-2		1.8-2		1.8-2
Post-vesting forfeiture rate (%)		5-10		5-10		5-10

key officers and directors [Member]

Disclosure of terms and conditions of share-based payment arrangement [line items]

Schedule of Number of Share Options

Option grants to key officers and directors:

Date of grant	Grantee	Options granted		Par Value (NIS)		Exercise prices (NIS)		Exercise prices ($)		Total fair value $ in thousands
March 22, 2015	President and CEO		170,000		0.02		39.62		9.78	$	663
March 22, 2015	Key officers		285,000		0.02		39.62		9.78	$	1,016
March 22, 2015	Director		2,500		0.02		38.77		9.57	$	20
March 22, 2015	Director		2,500		0.02		40.77		10.06	$	20
July 2, 2015	Directors		12,500		0.02		39.53		10.46	$	44
November 17, 2015	Key officers		160,000		0.02		31.77		8.14	$	382
December 16, 2015	Key officer		130,000		0.02		27.73		7.15	$	298
February 29, 2016	Director		2,500		0.02		28.28		7.23	$	14
February 29, 2016	Director		2,500		0.02		32.72		8.37	$	14
May 18, 2016	Directors		12,500		0.02		27.79		7.25	$	41
August 10, 2016	Director		10,000		0.02		26.89		7.06	$	27
September 26, 2016	Key officer		150,000		0.02		26.21		6.96	$	318
January 12, 2017	Director		2,500		0.02		21.18		5.54	$	6
April 2, 2017	Key officer		179,000		0.02		20.12		5.54	$	318
May 16, 2017	Directors		10,000		0.02		19.59		5.43	$	21
August 9, 2017	Key officers		550,000		0.02		18.71		5.20	$	705
August 10, 2017	Director		2,500		0.02		18.67		5.19	$	4
September 17, 2017	Director		2,500		0.02		17.34		4.92	$	4
October 1, 2017	Key officer		15,000		0.02		16.92		4.79	$	22