Related Party Transactions - Summary of Management Expenses (Details) - USD ($)	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Other Underwriting Expenses [Member]
Related Party Transaction [Line Items]
Management fees	$ 4,361,977	$ 6,330,762

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration