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Equity Transactions - Restricted Stock Units and Restricted Stock Awards (Details) - RSUs & RSAs - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
RSU & RSA
Outstanding as of September 30, 2018 (in shares)	2,316,865
Granted (in shares)	612,728
Exercised (in shares)	(731,433)
Forfeited (in shares)	(274,171)
Outstanding as of September 30, 2019 (in shares)	1,923,989	2,316,865
Expected to vest as of September 30, 2019 (in shares)	1,193,034
Weighted- Average Grant Date Fair Value
Outstanding as of September 30, 2018 (in dollars per share)	$ 7.19
Granted (in dollars per share)	6.70
Exercised (in dollars per share)	6.85
Forfeited (in dollars per share)	7.02
Outstanding as of September 30, 2019 (in dollars per share)	7.19	$ 7.19
Expected to vest as of September 30, 2019 (in dollars per share)	$ 6.96
Additional Disclosures
Outstanding, weighted-average remaining contractual term	2 years 1 month 2 days	2 years 2 months 1 day
Expected to vest as of September 30, 2019, weighted-average remaining contractual term	2 years 2 months 4 days
Aggregate Fair Value
Outstanding as of September 30, 2018, aggregate fair value	$ 14,712
Granted, aggregate fair value	4,103
Exercised, aggregate fair value	4,757
Forfeited, aggregate fair value	1,939
Outstanding as of September 30, 2019, aggregate fair value	14,237	$ 14,712
Expected to vest as of September 30, 2019, aggregate fair value	$ 8,828

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