Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation (Stock Options Valuation) (Details)

v3.5.0.2
Stock-Based Compensation (Stock Options Valuation) (Details) - Stock Options - $ / shares
12 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2014
Options [Roll Forward]      
Outstanding at beginning of period (in shares) 1,627,477 1,063,324 1,059,567
Granted (in shares) 360,075 327,500 272,906
Assumed - merger (shares) 0 367,229 0
Exercised (in shares) (15,346) (94,701) (263,643)
Forfeited/canceled (in shares) (130,639) (35,875) (5,506)
Outstanding at end of period (in shares) 1,841,567 1,627,477 1,063,324
Weighted Average Exercise Price [Abstract]      
Outstanding at beginning of period (usd per share) $ 9.11 $ 7.37 $ 6.71
Granted (usd per share) 5.25 9.74 7.01
Assumed - merger (usd per share) 0.00 14.19 0.00
Exercised (usd per share) 3.28 5.52 4.31
Forfeited (usd per share) 12.86 24.71 9.63
Outstanding at end of period (usd per share) $ 8.15 $ 9.11 $ 7.37
Exercisable at end of period (in shares) 1,127,611 1,002,421 674,237
Exercisable at end of period, weighted average exercise price (usd per share) $ 8.92 $ 9.74 $ 8.18
Weighted average grant-date fair value of options granted during the period (usd per share) $ 3.03 $ 5.91 $ 4.38