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Nature of Operations and Summary of Significant Accounting Policies - Cumulative Effect of Adoption of ASC 606 on Consolidated Financial Statements (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Oct. 01, 2018	Sep. 30, 2018
Assets
Accounts receivable, net	$ 14,566		$ 14,566			$ 16,821
Other current assets	3,084		3,084			1,053
Other non-current assets	20,317		20,317			15,356
Other non-current assets	2,524		2,524			2,147
Liabilities
Contract liabilities, current	6,317		6,317		$ 4,792	4,792
Contract liabilities, non-current	681		681		485	485
Equity
Accumulated deficit	(24,088)		(24,088)			(21,002)
Revenue
Total revenue	21,906	$ 16,109	59,572	$ 42,522
Operating expenses
Selling and marketing	6,935	5,740	20,895	15,863
Software and hardware
Revenue
Total revenue	11,888	10,458	32,468	26,437
Service and other
Revenue
Total revenue	10,018	$ 5,651	27,104	$ 16,085
Adjustments Due to the Adoption of ASC 606 \| ASU 2014-09
Assets
Accounts receivable, net	649		649
Other current assets	(1,983)		(1,983)			169
Other non-current assets	623		623			(267)
Other non-current assets	(128)		(128)			507
Liabilities
Contract liabilities, current	1,183		1,183			(511)
Contract liabilities, non-current	0		0			0
Equity
Accumulated deficit	(2,022)		(2,022)			$ 920
Revenue
Total revenue	(244)		(1,592)
Operating expenses
Selling and marketing	(10)		(9)
Adjustments Due to the Adoption of ASC 606 \| ASU 2014-09 \| Software and hardware
Revenue
Total revenue	(244)		(1,592)
Adjustments Due to the Adoption of ASC 606 \| ASU 2014-09 \| Service and other
Revenue
Total revenue	0		0
Balances without adoption of ASC 606
Assets
Accounts receivable, net	15,215		15,215
Other current assets	1,101		1,101		1,222
Other non-current assets	20,940		20,940		15,089
Other non-current assets	2,396		2,396		2,654
Liabilities
Contract liabilities, current	7,500		7,500		4,281
Contract liabilities, non-current	681		681		485
Equity
Accumulated deficit	(26,110)		(26,110)		$ (20,082)
Revenue
Total revenue	21,662		57,980
Operating expenses
Selling and marketing	6,925		20,886
Balances without adoption of ASC 606 \| Software and hardware
Revenue
Total revenue	11,644		30,876
Balances without adoption of ASC 606 \| Service and other
Revenue
Total revenue	$ 10,018		$ 27,104