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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 3) - Customer concentration - customer	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Concentration of Major Customers
Concentration Risk, Number of Customers	3
Net revenue
Concentration of Major Customers
Percentage of revenue from customers to total revenue	90.00%	91.00%	86.00%
Net revenue | Largest customer
Concentration of Major Customers
Percentage of revenue from customers to total revenue	34.00%	35.00%	32.00%
Net revenue | Second largest customer
Concentration of Major Customers
Percentage of revenue from customers to total revenue	30.00%	30.00%	28.00%
Net revenue | Third largest customer
Concentration of Major Customers
Percentage of revenue from customers to total revenue	26.00%	26.00%	26.00%
Net revenue | Customers outside U.S.
Concentration of Major Customers
Percentage of revenue from customers to total revenue	1.00%	1.00%	1.00%

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Concentration Risk, Number of Customers

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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=84177426&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=77997519&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=84177426&loc=d3e6404-108592

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
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-URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13537-108611

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