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Summary Of Significant Accounting Policies (Schedule Of Allowance For Doubtful Accounts) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Summary Of Significant Accounting Policies [Abstract]
Beginning balance	$ 12,000	$ 8,000
Bad debt provision	11,000	7,000
Accounts written-off	(1,000)	(3,000)
Ending balance	$ 22,000	$ 12,000

Amount of the current period expense charged against operations, the offset which is generally to the allowance for doubtful accounts for the purpose of reducing receivables, including notes receivable, to an amount that approximates their net realizable value (the amount expected to be collected).

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