Unbilled Receivables and Rental Income (Details Textual) (USD $)	6 Months Ended
Jan. 31, 2013
Provision for Doubtful Accounts	$ 240,000

- Definition

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).

+ References+ Details