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Marketable Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 22,498	$ 29,907
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	22,498	29,907
Money market mutual funds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	22,498	29,907
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	$ 22,498	$ 29,907

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- 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).

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