Summary of Significant Accounting Policies (Details 7)	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Swedish Krona [Member]
Weighted-average exchange rate for the condensed consolidated statements of operations
Weighted-average exchange rate for statements of operations	8.38	8.87
Japanese Yen [Member]
Weighted-average exchange rate for the condensed consolidated statements of operations
Weighted-average exchange rate for statements of operations	108.71	112.41
South Korean Won [Member]
Weighted-average exchange rate for the condensed consolidated statements of operations
Weighted-average exchange rate for statements of operations	1,074.69	1,138.83
Taiwan Dollar [Member]
Weighted-average exchange rate for the condensed consolidated statements of operations
Weighted-average exchange rate for statements of operations	29.52	30.64