Revenues - Additional Information (Details1) - Google [Member] $ in Thousands	Sep. 30, 2019 USD ($)
Disaggregation Of Revenue [Line Items]
Remaining performance obligation	$ 45
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2019-10-01
Disaggregation Of Revenue [Line Items]
Remaining performance obligation	$ 2,980
Remaining performance obligation, satisfaction period	3 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2020-01-01
Disaggregation Of Revenue [Line Items]
Remaining performance obligation	$ 8,940
Remaining performance obligation, satisfaction period	1 year