Fair Value Measurements and Available for Sale Investments - Schedule of Unrealized Loss and Fair Values in a Loss Position (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	$ 36,279	$ 23,594
Less than 12 Months, Gross Unrealized Losses	(32)	(6)
12 Months or Greater, Fair Value	0	0
12 Months or Greater, Gross Unrealized Losses	0	0
Fair Value	36,279	23,594
Gross Unrealized Losses	(32)	(6)
Agency securities
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	1,848
Less than 12 Months, Gross Unrealized Losses	(3)
12 Months or Greater, Fair Value	0
12 Months or Greater, Gross Unrealized Losses	0
Fair Value	1,848
Gross Unrealized Losses	(3)
Commercial and corporate obligations
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	34,431	5,986
Less than 12 Months, Gross Unrealized Losses	(29)	(4)
12 Months or Greater, Fair Value	0	0
12 Months or Greater, Gross Unrealized Losses	0	0
Fair Value	34,431	5,986
Gross Unrealized Losses	$ (29)	(4)
U.S. Treasury securities
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value		17,608
Less than 12 Months, Gross Unrealized Losses		(2)
12 Months or Greater, Fair Value		0
12 Months or Greater, Gross Unrealized Losses		0
Fair Value		17,608
Gross Unrealized Losses		$ (2)

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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