Cash, Cash Equivalents and Investments - Narrative (Details)
$ in Millions
|3 Months Ended|
Mar. 31, 2020
|Cash and Cash Equivalents [Abstract]|
|Realized gains (losses) recognized on available-for-sale investments||$ 0.2|
Amount of realized gain (loss) on 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