Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Total Revenue	$ 62,313	$ 44,955	[1]
North America, primarily United States
Disaggregation of Revenue [Line Items]
Total Revenue	46,335	29,337
Europe, Middle East & Africa
Disaggregation of Revenue [Line Items]
Total Revenue	10,104	10,156
Asia
Disaggregation of Revenue [Line Items]
Total Revenue	5,080	4,528
Latin America
Disaggregation of Revenue [Line Items]
Total Revenue	794	934
IoT Products & Services Segment
Disaggregation of Revenue [Line Items]
Total Revenue	53,294	40,880	[1]
IoT Products & Services Segment | Hardware product
Disaggregation of Revenue [Line Items]
Total Revenue	50,812	38,454
IoT Products & Services Segment | Services
Disaggregation of Revenue [Line Items]
Total Revenue	2,482	2,426
IoT Solutions Segment
Disaggregation of Revenue [Line Items]
Total Revenue	9,019	4,075	[1]
IoT Solutions Segment | Solutions
Disaggregation of Revenue [Line Items]
Total Revenue	$ 9,019	$ 4,075

[1] Prior period information has been restated for the adoption of ASU No. 2014-09, “Revenue from Contracts with Customers (Topic 606),” which we adopted on October 1, 2018.