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Revenue - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Mar. 31, 2019	Mar. 31, 2019
Revenue from External Customer [Line Items]
Sales	$ 16,350	$ 35,330
Product
Revenue from External Customer [Line Items]
Sales	13,566	29,241
Service
Revenue from External Customer [Line Items]
Sales	2,747	6,016
Finance
Revenue from External Customer [Line Items]
Sales	37	73
High Performance Products Segment
Revenue from External Customer [Line Items]
Sales	1,614	3,640
High Performance Products Segment | Product
Revenue from External Customer [Line Items]
Sales	1,375	3,108
High Performance Products Segment | Service
Revenue from External Customer [Line Items]
Sales	239	532
High Performance Products Segment | Finance
Revenue from External Customer [Line Items]
Sales	0	0
United Kingdom
Revenue from External Customer [Line Items]
Sales	1,983	3,785
United Kingdom | Product
Revenue from External Customer [Line Items]
Sales	1,888	3,620
United Kingdom | Service
Revenue from External Customer [Line Items]
Sales	95	165
United Kingdom | Finance
Revenue from External Customer [Line Items]
Sales	0	0
U.S.
Revenue from External Customer [Line Items]
Sales	12,753	27,905
U.S. | Product
Revenue from External Customer [Line Items]
Sales	10,303	22,513
U.S. | Service
Revenue from External Customer [Line Items]
Sales	2,413	5,319
U.S. | Finance
Revenue from External Customer [Line Items]
Sales	37	73
Total
Revenue from External Customer [Line Items]
Sales	14,736	31,690
Total | Product
Revenue from External Customer [Line Items]
Sales	12,191	26,133
Total | Service
Revenue from External Customer [Line Items]
Sales	2,508	5,484
Total | Finance
Revenue from External Customer [Line Items]
Sales	$ 37	$ 73

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+ References

No definition available.

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 32
-Paragraph 2A
-URI http://asc.fasb.org/extlink&oid=82859839&loc=SL82860478-203043

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130543-203045

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130539-203045

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130545-203045

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