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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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Segment Information and Major Customers Summary of Operating Results by Segment (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Sep. 30, 2018 USD ($) segment	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments \| segment									2
Revenue	$ 65,662	$ 62,716	$ 54,791	$ 45,197	$ 45,105	$ 45,739	$ 45,615	$ 45,175	$ 228,366	$ 181,634	$ 203,005
Operating income (loss)									2,322	8,807	17,105
Depreciation and amortization									12,270	5,497	4,584
IoT Products & Services
Segment Reporting Information [Line Items]
Revenue									201,506	174,237	202,294
Operating income (loss)									14,923	12,804	18,822
Depreciation and amortization									6,040	3,575	4,040
IoT Solutions
Segment Reporting Information [Line Items]
Revenue									26,860	7,397	711
Operating income (loss)									(12,601)	(3,997)	(1,717)
Depreciation and amortization									$ 6,230	$ 1,922	$ 544