Account Receivable (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Account receivable, gross	$ 3,205,000	$ 2,630,000
Less: Allowance for losses	(15,000)	(15,000)
Accounts receivable, trade	3,190,000	2,615,000
Trade Receivables [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Account receivable, gross	129,000	118,000
Accrued Receivables [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Account receivable, gross	2,826,000	$ 2,512,000
Qualified Intermediary [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Account receivable, gross	$ 250,000