Investor Notes Payable (Schedule of Maturities of Notes Payable) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Total	$ 73,101	$ 68,392
Notes Payable [Member]
Debt Instrument [Line Items]
2020	21,562
2021	18,953
2022	10,761
2023	10,543
2024	11,282
Total	$ 73,101

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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