Related Party Transactions - Additional Information (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Related Party Transaction [Line Items]
Balance with Fund Manager	$ 18,794		$ 14,613
Investment income (loss) generated from mutual funds	$ (107)	$ 145
Maximum [Member]
Related Party Transaction [Line Items]
Fund management fee percent	0.35%
Other Income [Member]
Related Party Transaction [Line Items]
Investment income (loss) generated from mutual funds	$ (106)	$ 265
Cash and Cash Equivalents [Member]
Related Party Transaction [Line Items]
Balance with Fund Manager	13,279		8,992
Marketable Securities [Member]
Related Party Transaction [Line Items]
Balance with Fund Manager	$ 5,515		$ 5,621