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Marketable Securities - Schedule of Fair Value Marketable Securities By Type of Security (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Marketable Securities [Line Items]
Amortized Cost	$ 135,878	$ 101,027
Unrealized Gains	32
Unrealized Losses		41
Fair Value	135,910	100,986
U.S. Government Agency Securities and Treasuries
Marketable Securities [Line Items]
Amortized Cost	135,878	101,027
Unrealized Gains	32
Unrealized Losses		41
Fair Value	$ 135,910	$ 100,986

X

- Definition

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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+ References

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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