Basis of Preparation (Details) - USD ($)	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Current Assets [Abstract]
Investment in sales-type sublease - current	$ 760,000	$ 873,000	$ 888,000
Long-term Assets [Abstract]
Investment in sales-type sublease - net of current portion	0	760,000	532,000
Operating lease right-of-use asset	103,000	136,000	128,000
Total leased assets	863,000	1,769,000
Current Liabilities [Abstract]
Obligations under finance lease - current portion	176,000	1,177,000	901,000
Operating lease right-of-use liability - current portion	39,000	35,000	36,000
Long-term Liabilities [Abstract]
Obligations under finance lease - net of current portion	0	176,000	89,000
Operating lease right-of-use liability - net of current portion	77,000	115,000	$ 106,000
Total lease liabilities	292,000	1,503,000
Lease Cost [Abstract]
Net lease (income)	(7,000)	0
Operating lease [Abstract]
2020	11,000
2021	45,000
2022	46,000
2023	24,000
Total	126,000
Less amount representing interest	10,000
Present value of lease liabilities	$ 116,000
Discount rate	5.85%
Finance Lease [Abstract]
2020	$ 90,000
2021	90,000
2022	0
2023	0
Total	180,000
Less amount representing interest	4,000
Present value of lease liabilities	$ 176,000
Discount rate	5.85%
Selling, General and Administrative Expenses [Member]
Lease Cost [Abstract]
Operating lease cost	$ 32,000	32,000
Interest Expense [Member]
Lease Cost [Abstract]
Finance lease cost, interest on lease liabilities	21,000	72,000
Interest Income - Sales-type Sublease [Member]
Lease Cost [Abstract]
Sublease income	$ 60,000	$ 104,000