Income Taxes - Schedule of Deferred Tax Assets (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Depreciation	$ 87,000	$ 89,000
Allowance for bad debts	234,000	225,000
Net operating loss carry-forwards	15,528,000	15,575,000
Stock option expense	257,000	257,000
Research and other credits	1,161,000	1,266,000
Other temporary differences	15,000	15,000
Total gross deferred tax assets	17,284,000	17,427,000
Less valuation allowance	(17,284,000)	(17,427,000)
Deferred Tax Assets, Net of Valuation Allowance