Summary of Significant Accounting Policies (Details 7)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Swedish Krona [Member]
Weighted-average exchange rate for the condensed consolidated statements of operations
Weighted-average exchange rate	8.11	8.92
Japanese Yen [Member]
Weighted-average exchange rate for the condensed consolidated statements of operations
Weighted-average exchange rate	108.38	113.71
South Korean Won [Member]
Weighted-average exchange rate for the condensed consolidated statements of operations
Weighted-average exchange rate	1,071.14	1,150.18
Taiwan Dollar [Member]
Weighted-average exchange rate for the condensed consolidated statements of operations
Weighted-average exchange rate	29.28	31.05