Revenue - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Oct. 01, 2018	Sep. 30, 2018
Capitalized Contract Cost [Line Items]
Managed service contracts, right to refund, period		30 days
Current contract assets	$ 600	$ 600	$ 1,100
Non-current contract assets	0	0	0
Current contract liabilities	791	791	900	$ 1,197
Revenue recognized included in contract liabilities		700
Non-current contract liabilities	0	0	0
Current capitalized costs	54	54	71
Non-current capitalized costs	0	0	0
Incremental costs amortized	66	174
Impairment related to incremental costs capitalized	0	$ 0
Payments terms		30 days
Practical Expedient, Incremental Costs		true
Practical Expedient, Financing Component		true
Remaining Performance Obligation, Optional Exemption		true
Europe
Capitalized Contract Cost [Line Items]
Payments terms		90 days
Total
Capitalized Contract Cost [Line Items]
Current capitalized costs	48	$ 48	60
Non-current capitalized costs	0	0	$ 0
Incremental costs amortized	1	9
Impairment related to incremental costs capitalized	$ 0	$ 0