Related Party Transactions - Additional Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Related Party Transaction [Line Items]
Balance with Fund Manager	$ 18,918		$ 14,536
Maximum [Member]
Related Party Transaction [Line Items]
Fund management fee percent	0.35%
Other Income (Expense) [Member]
Related Party Transaction [Line Items]
Investment income generated from mutual funds	$ 15	$ 179
Interest earnings generated from mutual funds	52	$ 167
Cash and Cash Equivalents [Member]
Related Party Transaction [Line Items]
Balance with Fund Manager	13,281		8,915
Marketable Securities [Member]
Related Party Transaction [Line Items]
Balance with Fund Manager	$ 5,636		$ 5,621