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Revenue - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Revenue from External Customer [Line Items]
Managed service contracts, right to refund, period	30 days
Total sales	$ 16,572	$ 18,980
Product
Revenue from External Customer [Line Items]
Sales	13,196	15,674
Total sales	13,222	15,711
Service
Revenue from External Customer [Line Items]
Sales	3,350	3,269
Total sales	3,350	3,269
Finance
Revenue from External Customer [Line Items]
Finance	26	37
High Performance Products Segment
Revenue from External Customer [Line Items]
Total sales	1,041	2,026
High Performance Products Segment | Product
Revenue from External Customer [Line Items]
Sales	767	1,733
Total sales	767	1,733
High Performance Products Segment | Service
Revenue from External Customer [Line Items]
Sales	274	293
Total sales	274	293
TS
Revenue from External Customer [Line Items]
Total sales	15,531	16,954
TS | U.K.
Revenue from External Customer [Line Items]
Total sales	679	1,802
TS | U.S.
Revenue from External Customer [Line Items]
Total sales	14,852	15,152
TS | Product
Revenue from External Customer [Line Items]
Sales	12,429	13,941
Total sales	12,455	13,978
TS | Product | U.K.
Revenue from External Customer [Line Items]
Sales	553	1,732
Total sales	553	1,732
TS | Product | U.S.
Revenue from External Customer [Line Items]
Sales	11,876	12,209
Total sales	11,902	12,246
TS | Service
Revenue from External Customer [Line Items]
Sales	3,076	2,976
Total sales	3,076	2,976
TS | Service | U.K.
Revenue from External Customer [Line Items]
Sales	126	70
Total sales	126	70
TS | Service | U.S.
Revenue from External Customer [Line Items]
Sales	2,950	2,906
Total sales	2,950	2,906
TS | Finance
Revenue from External Customer [Line Items]
Finance	26	37
TS | Finance | U.S.
Revenue from External Customer [Line Items]
Finance	$ 26	$ 37

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Managed Service Contracts, Right to Refund, Period

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Amount of revenue that is not accounted for under Topic 606.

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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.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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