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Significant Customers - Schedules of Concentration of Risk, by Risk Factor of Sales Revenue and Accounts Receivable (Details) | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Concentration risk, percentage | 10.00% |  |  |  |
Sales Revenues [Member] |  |  |  |  |
Concentration risk, percentage | 16.30% |  | 24.60% | 16.00% |
Sales Revenues [Member] | Customer A [Member] |  |  |  |  |
Concentration risk, percentage | 16.30% |  | 14.20% | 16.00% |
Sales Revenues [Member] | Customer B [Member] |  |  |  |  |
Concentration risk, percentage | 0.00% | [1] | 10.40% | 0.00% | [1]
Accounts Receivable [Member] |  |  |  |  |
Concentration risk, percentage | 25.10% |  | 34.00% |  |
Accounts Receivable [Member] | Customer A [Member] |  |  |  |  |
Concentration risk, percentage | 13.40% |  | 18.00% |  |
Accounts Receivable [Member] | Customer B [Member] |  |  |  |  |
Concentration risk, percentage | 11.70% |  | 16.00% |  |
[1] | Sales didn't exceed 10% of the revenue

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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 + Details
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