INCOME TAXES: (Details textual) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Federal statutory income tax rate (percent)	35.00%
Part of unrecognized tax benefits	$ 589us-gaap_UnrecognizedTaxBenefits	$ 676us-gaap_UnrecognizedTaxBenefits	$ 777us-gaap_UnrecognizedTaxBenefits	$ 862us-gaap_UnrecognizedTaxBenefits
Increase (decrease) in interest and penalities	(21)	(31)	(2)
Income tax examination, penalties and interest accrued	$ 44	$ 65	$ 96

Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 12

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-Name Accounting Standards Codification

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-Subparagraph (SAB TOPIC 6.I)

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

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The amount of estimated penalties and interest accrued as of the balance sheet date arising from income tax examinations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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The sum of the amounts of estimated penalties and interest recognized in the period arising from income tax examinations.

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Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Unrecognized Tax Benefit

-URI http://asc.fasb.org/extlink&oid=6527854

Reference 2: http://www.xbrl.org/2003/role/presentationRef

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