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Summary of Significant Accounting Policies (Details 7) | 9 Months Ended
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Sep. 30, 2018 | Sep. 30, 2017
Swedish Krona [Member] |  |
Weighted-average exchange rate for the condensed consolidated statements of operations |  |
Weighted-average exchange rate for statements of operations | 8.57 | 8.62
Japanese Yen [Member] |  |
Weighted-average exchange rate for the condensed consolidated statements of operations |  |
Weighted-average exchange rate for statements of operations | 109.63 | 111.91
South Korean Won [Member] |  |
Weighted-average exchange rate for the condensed consolidated statements of operations |  |
Weighted-average exchange rate for statements of operations | 1,090.03 | 1,136.27
Taiwan Dollar [Member] |  |
Weighted-average exchange rate for the condensed consolidated statements of operations |  |
Weighted-average exchange rate for statements of operations | 29.90 | 30.51

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