Summary of Significant Accounting Policies (Details 6)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Swedish Krona [Member]
Weighted-average exchange rate for the condensed consolidated statements of operations
Weighted-average exchange rate for statements of operations	9.18	8.11
Japanese Yen [Member]
Weighted-average exchange rate for the condensed consolidated statements of operations
Weighted-average exchange rate for statements of operations	110.15	108.38
South Korean Won [Member]
Weighted-average exchange rate for the condensed consolidated statements of operations
Weighted-average exchange rate for statements of operations	1,125.77	1,071.14
Taiwan Dollar [Member]
Weighted-average exchange rate for the condensed consolidated statements of operations
Weighted-average exchange rate for statements of operations	30.83	29.28