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SHAREHOLDERS' EQUITY (Stock Options Under the Plans by Exercise Price) (Details)	3 Months Ended
	Mar. 31, 2016 $ / shares shares
Options outstanding at December 31, 2015
Number outstanding | shares	756,225
Options exercisable at December 31, 2015
Number outstanding | shares	653,100
Employee Stock Option [Member] | Range One [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Minimum exercise price	$ 1.87
Maximum exercise price	$ 1.95
Options outstanding at December 31, 2015
Number outstanding | shares	3,550
Weighted average exercise price	$ 1.89
Weighted average remaining contractual life (in years)	7 months 17 days
Options exercisable at December 31, 2015
Number outstanding | shares	3,550
Weighted average exercise price	$ 1.89
Weighted average remaining contractual life	7 months 17 days
Employee Stock Option [Member] | Range Two [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Minimum exercise price	$ 2.56
Maximum exercise price	$ 4.86
Options outstanding at December 31, 2015
Number outstanding | shares	220,300
Weighted average exercise price	$ 3.56
Weighted average remaining contractual life (in years)	2 years 5 months 1 day
Options exercisable at December 31, 2015
Number outstanding | shares	200,300
Weighted average exercise price	$ 3.60
Weighted average remaining contractual life	2 years 3 months 22 days
Employee Stock Option [Member] | Range Three [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Minimum exercise price	$ 5.0
Maximum exercise price	$ 9.64
Options outstanding at December 31, 2015
Number outstanding | shares	200,625
Weighted average exercise price	$ 6.06
Weighted average remaining contractual life (in years)	3 years 2 months 23 days
Options exercisable at December 31, 2015
Number outstanding | shares	199,250
Weighted average exercise price	$ 6.03
Weighted average remaining contractual life	3 years 2 months 19 days
Employee Stock Option [Member] | Range Four [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Minimum exercise price	$ 10.49
Maximum exercise price	$ 14.52
Options outstanding at December 31, 2015
Number outstanding | shares	331,750
Weighted average exercise price	$ 6.06
Weighted average remaining contractual life (in years)	3 years 8 months 5 days
Options exercisable at December 31, 2015
Number outstanding | shares	250,000
Weighted average exercise price	$ 11.33
Weighted average remaining contractual life	3 years 4 months 10 days

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- Definition

The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(iii)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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-Section 50
-Paragraph 2
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-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iii)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Weighted average remaining contractual term of exercisable stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Paragraph 2
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The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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