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Major Customers (Details) - customer	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Customer Concentration Risk | Sales Revenue, Goods, Net
Concentration Risk [Line Items]
Number of customers	5		5,000,000
Concentration risk (as a percent) (more than for 10.0%)	40.60%	41.20%
Customer Concentration Risk | Accounts Receivable
Concentration Risk [Line Items]
Number of customers	5		5
Credit Concentration Risk | Accounts Receivable
Concentration Risk [Line Items]
Concentration risk (as a percent) (more than for 10.0%)	37.80%		37.70%
North America | Sales Revenue, Goods, Net
Concentration Risk [Line Items]
Number of customers	1		1
North America | Customer Concentration Risk | Sales Revenue, Goods, Net
Concentration Risk [Line Items]
Number of customers	5		5
Concentration risk (as a percent) (more than for 10.0%)	20.80%	22.20%

X

- Definition

The number of major customers who have a combined sales and accounts receivable concentration of greater than 10% and is separately disclosed.

+ References

No definition available.

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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

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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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