Revenue, Remaining Performance Obligation (Details) $ in Thousands	Mar. 31, 2019 USD ($)
Remaining Performance Obligation [Abstract]
Remaining performance obligations	$ 423
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-04-01
Remaining Performance Obligation [Abstract]
Remaining performance obligations	$ 169
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-04-01 | Minimum [Member]
Remaining Performance Obligation [Abstract]
Expected timing of satisfaction period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-04-01 | Maximum [Member]
Remaining Performance Obligation [Abstract]
Expected timing of satisfaction period	3 years