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Allowance for Doubtful Accounts (Details) (USD $)	3 Months Ended	9 Months Ended
Allowance for Doubtful Accounts (Details) (USD $)	Sep. 30, 2012	Sep. 30, 2012 item	Sep. 30, 2013	Dec. 31, 2012
Allowance for Doubtful Accounts
Balance in allowance for doubtful accounts			$ 0	$ 132,000
Bad debt expense	16,000	56,000
Number of tenants from whom the doubtful collections were received		1
Discontinued operations
Allowance for Doubtful Accounts
Net recoveries of bad debt	$ 116,000	$ 173,000

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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