Acquisition-Related Intangible Assets - Intangible Assets Acquired through Business Combination (Details) $ in Thousands	Sep. 30, 2018 USD ($)
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 20,500
Accumulated Amortization	(2,388)
Net Carrying Amount	18,112
Acquired developed technology
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	8,100
Accumulated Amortization	(1,350)
Net Carrying Amount	6,750
Customer contracts and related relationships
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	11,400
Accumulated Amortization	(760)
Net Carrying Amount	10,640
Order backlog
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	500
Accumulated Amortization	(167)
Net Carrying Amount	333
Trademarks and trade name
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	500
Accumulated Amortization	(111)
Net Carrying Amount	$ 389