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Summary of Significant Accounting Policies (Details 7)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Swedish Krona [Member]
Weighted average exchange rate for consolidated statements of operations
weighted-average exchange rate	8.70	8.54
Japanese Yen [Member]
Weighted average exchange rate for consolidated statements of operations
weighted-average exchange rate	110.43	112.15
South Korean Won [Member]
Weighted average exchange rate for consolidated statements of operations
weighted-average exchange rate	1,100.50	1,128.65
Taiwan Dollar [Member]
Weighted average exchange rate for consolidated statements of operations
weighted-average exchange rate	30.15	30.41

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