Business Acquisitions Summary of Intangible Assets Acquired (Details) - Lavante [Member] $ in Thousands	Oct. 31, 2016 USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets acquired	$ 6,178
Developed Technology Rights [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets acquired	$ 5,901
Intangible assets acquired weighted average useful life	48 months
Patents [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets acquired	$ 114
Intangible assets acquired weighted average useful life	12 months
Trademarks [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets acquired	$ 163
Intangible assets acquired weighted average useful life	48 months