Annual report pursuant to Section 13 and 15(d)

Equity - Summary of the Company's Stock Option Activity (Details)

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Equity - Summary of the Company's Stock Option Activity (Details) - Stock options
12 Months Ended
Sep. 30, 2016
$ / shares
shares
Summary of stock option activity  
Outstanding at the beginning of the period (in shares) | shares 160,000
Exercised (in shares) | shares (80,000)
Outstanding and exercisable at the end of the period (in shares) | shares 80,000
Weighted Average Exercise Price  
Outstanding at the beginning of the period (in dollars per share) | $ / shares $ 9.18
Exercised (in dollars per share) | $ / shares 6.82
Outstanding and exercisable at the end of the period (in dollars per share) | $ / shares $ 11.55