Stock-based Compensation - Share-based Payment Arrangement, Option, Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Options (Shares)
Outstanding, beginning balance (in shares)	770,000
Stock options, granted (in shares)	0
Stock options, exercised (in shares)	(123,334)
Stock options, expired (in shares)	0
Stock options, forfeited (in shares)	(546,666)
Outstanding, ending balance (in shares)	100,000	770,000
Exercisable (in shares)	66,667
Weighted Average Exercise Price
Outstanding, weighted average exercise price, beginning balance (in dollars per share)	$ 1.73
Granted (in dollars per share)	0
Exercised (in dollars per share)	1.67
Expired (in dollars per share)	0
Forfeited (in dollars per share)	0
Outstanding, weighted average exercise price, ending balance (in dollars per share)	1.55	$ 1.73
Exercisable (in dollars per share)	$ 1.68
Aggregate Intrinsic Value
Aggregate intrinsic value, outstanding, beginning balance	$ 353
Aggregate intrinsic value, exercised	304	$ 0
Aggregate intrinsic value, forfeited	606
Aggregate intrinsic value, outstanding, ending balance	38	$ 353
Aggregate intrinsic value, exercisable	$ 16