Subsequent Events (Details) - Subsequent Event [Member] - Revolving Line of Credit - Revolving Line of Credit 3 $ in Millions	Oct. 03, 2018 USD ($)
Subsequent Event [Line Items]
Revolving line of credit maximum borrowing capacity	$ 7
Minimum
Subsequent Event [Line Items]
Draw term	60 days
Maximum
Subsequent Event [Line Items]
Draw term	90 days
Banks Cost of Fund lending Rate | U.S. Dollars
Subsequent Event [Line Items]
Basis spread on variable rate	1.25%
Bank's cost of fund lending rate	0.77%
Banks Cost of Fund lending Rate | NTD
Subsequent Event [Line Items]
Basis spread on variable rate	1.35%
Bank's cost of fund lending rate	2.54%