Revenue - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Revenue from External Customer [Line Items]
Managed service contracts, right to refund, period	30 days
Total sales	$ 11,388	$ 16,858
Product
Revenue from External Customer [Line Items]
Sales	8,397	13,533
Total sales	8,408	13,559
Service
Revenue from External Customer [Line Items]
Sales	2,980	3,299
Total sales	2,980	3,299
Finance
Revenue from External Customer [Line Items]
Finance	11	26
High Performance Products Segment
Revenue from External Customer [Line Items]
Total sales	1,556	1,041
High Performance Products Segment | Product
Revenue from External Customer [Line Items]
Sales	1,176	767
Total sales	1,176	767
High Performance Products Segment | Service
Revenue from External Customer [Line Items]
Sales	380	274
Total sales	380	274
TS
Revenue from External Customer [Line Items]
Total sales	9,832	15,817
TS | U.K.
Revenue from External Customer [Line Items]
Total sales	1,490	679
TS | U.S.
Revenue from External Customer [Line Items]
Total sales	8,342	15,138
TS | Product
Revenue from External Customer [Line Items]
Sales	7,221	12,766
Total sales	7,232	12,792
TS | Product | U.K.
Revenue from External Customer [Line Items]
Sales	1,403	553
Total sales	1,403	553
TS | Product | U.S.
Revenue from External Customer [Line Items]
Sales	5,818	12,213
Total sales	5,829	12,239
TS | Service
Revenue from External Customer [Line Items]
Sales	2,600	3,025
Total sales	2,600	3,025
TS | Service | U.K.
Revenue from External Customer [Line Items]
Sales	87	126
Total sales	87	126
TS | Service | U.S.
Revenue from External Customer [Line Items]
Sales	2,513	2,899
Total sales	2,513	2,899
TS | Finance
Revenue from External Customer [Line Items]
Finance	11	26
TS | Finance | U.S.
Revenue from External Customer [Line Items]
Finance	$ 11	$ 26