Revenue - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Revenue from External Customer [Line Items]
Sales	$ 21,570	$ 56,900
Product
Revenue from External Customer [Line Items]
Sales	18,043	47,284
Service
Revenue from External Customer [Line Items]
Sales	3,494	9,510
Finance
Revenue from External Customer [Line Items]
Sales	33	106
High Performance Products Segment
Revenue from External Customer [Line Items]
Sales	2,140	5,780
High Performance Products Segment | Product
Revenue from External Customer [Line Items]
Sales	1,592	4,700
High Performance Products Segment | Service
Revenue from External Customer [Line Items]
Sales	548	1,080
United Kingdom
Revenue from External Customer [Line Items]
Sales	829	4,614
United Kingdom | Product
Revenue from External Customer [Line Items]
Sales	720	4,340
United Kingdom | Service
Revenue from External Customer [Line Items]
Sales	109	274
U.S.
Revenue from External Customer [Line Items]
Sales	18,601	46,506
U.S. | Product
Revenue from External Customer [Line Items]
Sales	15,731	38,244
U.S. | Service
Revenue from External Customer [Line Items]
Sales	2,837	8,156
U.S. | Finance
Revenue from External Customer [Line Items]
Sales	33	106
Total
Revenue from External Customer [Line Items]
Sales	19,430	51,120
Total | Product
Revenue from External Customer [Line Items]
Sales	16,451	42,584
Total | Service
Revenue from External Customer [Line Items]
Sales	2,946	8,430
Total | Finance
Revenue from External Customer [Line Items]
Sales	$ 33	$ 106