Stock-Based Compensation - Share-based Payment Arrangement, Option, Activity (Details) $ / shares in Units, $ in Thousands	9 Months Ended
	Jun. 30, 2021 USD ($) $ / shares shares
Wtd. Avg. Ex. Price
Outstanding, beginning balance (in dollars per share) | $ / shares	$ 1.55
Exercised (in dollars per share) | $ / shares	1.81
Forfeited (in dollars per share) | $ / shares	1.81
Outstanding, ending balance (in dollars per share) | $ / shares	1.28
Exercisable (in dollars per share) | $ / shares	$ 1.28
Shares
Outstanding, beginning balance (in shares) | shares	100,000
Exercised (in shares) | shares	(49,000)
Forfeited (in shares) | shares	(1,000)
Outstanding, ending balance (in shares) | shares	50,000
Exercisable (in shares) | shares	34,334
Aggregate Intrinsic Value
Outstanding beginning balance | $	$ 37
Exercised | $	49
Outstanding ending balance | $	69
Exercisable | $	$ 44