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O. MAJOR CUSTOMERS - NARRATIVE (Details)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Sales Revenue, Segment [Member] | Five Customers [Member]
Concentration risk	87.80%	81.80%	72.00%
Sales Revenue, Segment [Member] | Amazon [Member]
Concentration risk	54.60%	52.50%	45.80%
Sales Revenue, Segment [Member] | Microsoft [Member]
Concentration risk	18.30%	11.60%
Sales Revenue, Segment [Member] | Cisco Systems, Inc. [Member]
Concentration risk		10.40%	8.90%
Sales Revenue, Segment [Member] | Leading Internet Service Provider [Member]
Concentration risk			6.70%
Sales Revenue, Segment [Member] | Arris [Member]
Concentration risk	5.80%
Accounts Receivable [Member] | Five Customers [Member]
Concentration risk	88.30%	80.00%
Accounts Receivable [Member] | Amazon [Member]
Concentration risk	62.10%	51.40%
Accounts Receivable [Member] | Wesco [Member]
Concentration risk		14.40%
Accounts Receivable [Member] | Arris [Member]
Concentration risk	10.60%

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=64851502&loc=d3e6351-108592

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13531-108611

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=64851502&loc=d3e6404-108592

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13537-108611

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