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Significant Concentrations (Tables) | 12 Months Ended
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Dec. 31, 2016
Sales Revenue, Net [Member] |
Schedules of Concentration of Risk, by Risk Factor [Table Text Block] | The Company depends on two customers for majority of its revenues and the loss of, or a significant reduction in orders would significantly reduce the Company’s revenues and adversely impact the Company’s operating results. The Company’s sales to these two customers as a percentage of revenues are as follows:
|  | Year Ended December 31, |
|  | 2014 |  | 2015 |  | 2016 |
Customer A and its affiliates |  |  | 18.1 | % |  | 20.1 | % |  | 22.4 | %
Customer B and its affiliates |  |  | 19.6 | % |  | 21.1 | % |  | 15.2 | %
Accounts Receivable [Member] |
Schedules of Concentration of Risk, by Risk Factor [Table Text Block] | The percentage of the Company’s accounts receivable accounted by customers, those representing more than 10% of total accounts receivable balance, is summarized as follows:
|  | December 31, |
|  | 2015 |  | 2016 |
Customer A and its affiliates |  |  | 22.8 | % |  | 29.2 | %
Customer B and its affiliates |  |  | 22.2 | % |  | 19.3 | %

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- Definition Tabular disclosure of the nature of a concentration, a benchmark to which it is compared, and the percentage that the risk is to the benchmark. + 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 21 -URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13537-108611 Reference 3: 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 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 21 -URI http://asc.fasb.org/extlink&oid=64851502&loc=d3e6442-108592 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=64851502&loc=d3e6327-108592 Reference 6: 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 + Details
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