Acquisitions (Schedule of Acquired Intangible Assets) (Details) - SolarBOS $ in Thousands	Aug. 21, 2018 USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Fair Value, finite-lived intangible assets acquired	$ 1,450
Trademarks
Acquired Finite-Lived Intangible Assets [Line Items]
Fair Value, finite-lived intangible assets acquired	$ 300
Estimated Useful Life	3 years
Technology
Acquired Finite-Lived Intangible Assets [Line Items]
Fair Value, finite-lived intangible assets acquired	$ 450
Estimated Useful Life	9 years
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Fair Value, finite-lived intangible assets acquired	$ 700
Estimated Useful Life	9 years