Short Term Investments (Tables)
|9 Months Ended|
Sep. 30, 2018
|Investments, Debt and Equity Securities [Abstract]|
|Debt Securities, Available-for-sale||
The following table summarizes the available-for-sale investments held as of September 30, 2018. There were no available-for-sale investments in prior periods.
Tabular disclosure of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).
Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef