Short-Term Investments (Tables)  | 
3 Months Ended | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Mar. 31, 2020  | |||||||||||||||||||
| Investments, Debt and Equity Securities [Abstract] | |||||||||||||||||||
| Schedule of Available-for-Sale Investments Held | 
 The following table summarizes the available-for-sale investments held: 
 
  | 
||||||||||||||||||
| X | ||||||||||
- Definition 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 
  | 
| X | ||||||||||
- References No definition available. 
  |