Real Estate Loans, Notes Receivable, and Lines of Credit Notes and lines of credit (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
line of credit receivable		$ 41,917
Financing Receivable, Gross	$ 24,810
Loans and Leases Receivable, Net Amount	11,905	41,917
Loans and Leases Receivable, Deferred Income	0	(33)
PCMS [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Gross	0
Loans and Leases Receivable, Net Amount	0	650
PAA [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
line of credit receivable	0
Loans and Leases Receivable, Net Amount	0	15,178
HCC [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
line of credit receivable	11,660
Loans and Leases Receivable, Net Amount	$ 9,011	9,011
interest rate note receivable	8.00%
Oxford Capital Partners LLC [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
line of credit receivable	$ 8,000
Loans and Leases Receivable, Net Amount	$ 1,006	5,438
interest rate note receivable	10.00%
newport development partners [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
line of credit receivable	$ 1,000
Loans and Leases Receivable, Net Amount	$ 0	0
interest rate note receivable	12.00%
Mulberry Development Group LLC [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
line of credit receivable	$ 750
Loans and Leases Receivable, Net Amount	$ 670	525
interest rate note receivable	12.00%
360 Capital Company - Due December 31, 2019 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
line of credit receivable	$ 3,400
Loans and Leases Receivable, Net Amount	$ 1,218	3,394
interest rate note receivable	12.00%
360 Capital Company - Due December 31, 2020 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
line of credit receivable	$ 0
Loans and Leases Receivable, Net Amount	$ 0	$ 7,754