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RELATED PARTY TRANSACTIONS (Narrative) (Details) - USD ($) $ in Thousands		12 Months Ended
	Jan. 17, 2014	Dec. 31, 2015	Dec. 31, 2013
SBI [Member]
Related Party Transaction [Line Items]
Investment in affiliate		$ 1,300
Softbank and affiliates [Member]
Related Party Transaction [Line Items]
Accounts receivable			$ 19,000
Service period of sales to related party		3 years
Period over which product failure rates exceed a certain level under the penalty clause		7 years
Customer advances			3,100
Deferred revenue current			2,000
Deferred revenue noncurrent			$ 3,800
Softbank and affiliates [Member] | Share Purchase Agreement [Member]
Related Party Transaction [Line Items]
Ownership interest held by related party (as a percent)	12.30%

X

- Definition

Amount of receivables arising from transactions with related parties due within one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.3(a)(2))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39603-107864

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(k)(1))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 4: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39622-107864

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X

- Definition

This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=35755396&loc=d3e33749-111570

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

The current portion of prepayments received from customers that are related party for goods or services to be provided in the future by the entity.

+ References

No definition available.

+ Details

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X

- Definition

The carrying amount of consideration received or receivable from related parties as of the balance sheet date on potential earnings that were not recognized as revenue in conformity with GAAP, and which are expected to be recognized as such within one year or the normal operating cycle, if longer, including sales, license fees, and royalties, but excluding interest income.

+ References

No definition available.

+ Details

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X

- Definition

The carrying amount of consideration received or receivable from related parties as of the balance sheet date on potential earnings that were not recognized as revenue in conformity with GAAP, and which are expected to be recognized as such beyond one year or the normal operating cycle, if longer, including sales, license fees, and royalties, but excluding interest income.

+ References

No definition available.

+ Details

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- Definition

Represents the percentage of entity's outstanding shares owned by related parties.

+ References

No definition available.

+ Details

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X

- Definition

Represents the period over which product failure rates exceed a certain level under the penalty clause made by the entity.

+ References

No definition available.

+ Details

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- Definition

Represents the service period of sales to related party made by the entity.

+ References

No definition available.

+ Details

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- Details

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