Earnings Per Share - Reconciliation of Components of Basic and Diluted EPS Calculations (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		6 Months Ended
		Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024
Numerator:
Net Income (Loss)		$ (31,812)	$ 970	$ (31,500)	$ (8,388)
Denominator:
Weighted-average shares used to compute basic EPS		14,296,000	14,197,000	14,284	14,193
Weighted-average shares used to compute diluted EPS		14,296,000	14,209,000	14,284	14,193
Net (loss) income per basic share		$ (2.23)	$ 0.07	$ (2.21)	$ (0.59)
Net (loss) income per diluted share		$ (2.23)	$ 0.07	$ (2.21)	$ (0.59)
RSU
Denominator:
Dilutive potential common shares	[1]		12,000

[1] The number of common stock equivalents is calculated using the treasury method and the average market price during the period.