Income Taxes (Schedule of Deferred Tax Assets (Liabilities)) (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets:
Net operating losses	$ 6,043,000	$ 6,876,000
Lease liabilities	722,000	810,000
Share-based compensation	61,000
Intangible assets	2,000
Subtotal	6,828,000	7,686,000
Less: Valuation allowance	(1,070,000)	(1,236,000)
Total Deferred tax assets	5,758,000	6,450,000
Deferred tax liabilities:
Fixed assets	(901,000)	(1,062,000)
Total Deferred tax liabilities	(901,000)	(1,062,000)
Total Deferred tax assets	$ 4,857,000	$ 5,388,000