Investment in Unconsolidated Entities - Cash Received and Distributions (Details) - USD ($)	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
NewINK Joint Venture
Schedule of Equity Method Investments [Line Items]
Cash distributions	$ 0	$ 411,000	$ 0	$ 411,000
Total	0	411,000	$ 0	411,000
Inland Joint Venture
Schedule of Equity Method Investments [Line Items]
Cash distributions	$ 0	$ 0		$ 0

Amount of increase (decrease) in cash and cash equivalents. Cash and cash equivalents are the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Includes effect from exchange rate changes.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration