| 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: 
 
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| X | ||||||||||
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- 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 | ||||||||||
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- References No definition available. 
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