Stock-based Compensation and Equity Grants - Stock Options Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Number of Shares
Outstanding at beginning of period (in shares)	2,134
Granted (in shares)	35
Exercised or canceled (in shares)	(35)
Outstanding at end of period (in shares)	2,134	2,134
Weighted Average Exercise Price
Outstanding at beginning of period (in dollars per share)	$ 4.31
Granted (in dollars per share)	5.25
Exercised or canceled (in dollars per share)	1.12
Outstanding at end of period (in dollars per share)	$ 4.36	$ 4.31
Weighted Average Remaining Contractual Term
Options outstanding at the of period (in years)	5 years 10 months 25 days	6 years 3 months 18 days
Aggregate Intrinsic Value
Options outstanding at the end of period	$ 4,815	$ 6,949
Weighted average value of shares granted (in dollars per share)	$ 3.82