Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Narrative (Details)

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Stockholders' Equity - Narrative (Details) - USD ($)
3 Months Ended 9 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Sep. 30, 2015
Class of Stock [Line Items]          
Shares of common stock authorized to be repurchased (up to) (in shares) 50,000   50,000   170,000
Shares available to purchase (in shares) 50,000   50,000    
Corporate, General and Administrative Expense          
Class of Stock [Line Items]          
Stock-based compensation expense $ 214,000 $ 176,200 $ 635,000 $ 585,000