Segment Information - Sales By Geographic Area (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting, Revenue Reconciling Item [Line Items]
Customer Revenues	$ 64,647	$ 54,361
% of total	100.00%	100.00%
Americas
Segment Reporting, Revenue Reconciling Item [Line Items]
Customer Revenues	$ 62,763	$ 52,486
% of total	97.00%	96.00%
Europe
Segment Reporting, Revenue Reconciling Item [Line Items]
Customer Revenues	$ 1,429	$ 1,407
% of total	2.00%	3.00%
Asia
Segment Reporting, Revenue Reconciling Item [Line Items]
Customer Revenues	$ 455	$ 468
% of total	1.00%	1.00%
TS
Segment Reporting, Revenue Reconciling Item [Line Items]
Customer Revenues	$ 57,774	$ 50,518
% of total	89.00%	93.00%
TS | Americas
Segment Reporting, Revenue Reconciling Item [Line Items]
Customer Revenues	$ 56,584	$ 49,285
TS | Europe
Segment Reporting, Revenue Reconciling Item [Line Items]
Customer Revenues	1,094	1,069
TS | Asia
Segment Reporting, Revenue Reconciling Item [Line Items]
Customer Revenues	96	164
HPP
Segment Reporting, Revenue Reconciling Item [Line Items]
Customer Revenues	$ 6,873	$ 3,843
% of total	11.00%	7.00%
HPP | Americas
Segment Reporting, Revenue Reconciling Item [Line Items]
Customer Revenues	$ 6,179	$ 3,201
HPP | Europe
Segment Reporting, Revenue Reconciling Item [Line Items]
Customer Revenues	335	338
HPP | Asia
Segment Reporting, Revenue Reconciling Item [Line Items]
Customer Revenues	$ 359	$ 304