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Employee 401(k) Profit Sharing Plans	12 Months Ended
Employee 401(k) Profit Sharing Plans	Sep. 30, 2016
Compensation And Retirement Disclosure [Abstract]
Employee 401(k) Profit Sharing Plans	17. EMPLOYEE 401(k) PROFIT SHARING PLANS: Employees are eligible to participate in our 401(k) Profit Sharing Plan (the “Plan”) following their 90-day introductory period starting either April 1 or October 1, provided that they are 21 years of age. Under the Plan, we match 25% of participants’ contributions, up to a maximum of 5% of each participant’s compensation. We contributed, under the Plan, or pursuant to previous similar plans, approximately $463,000, $605,000, and $713,000 for the fiscal years ended September 30, 2014, 2015, and 2016, respectively.