Income Taxes (Schedule Of Components Of The Net Deferred Tax Liability) (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Income Taxes [Abstract]
Vacation Disallowance	$ 26,000	$ 24,000
Allowance for Doubtful Accounts	4,000	4,000
State Carryforward R&D Credit	0	3,000
Total Deferred Tax Assets	30,000	31,000
Prepaid Expenses	23,000	26,000
Depreciation	100,000	60,000
Net Unrealized Gain on Investments	1,362,000	1,170,000
Total Deferred Tax Liabilities	1,485,000	1,256,000
Net Deferred Tax Liability	$ (1,455,000)	$ (1,225,000)