Summary of Significant Accounting Policies Revenue Recognition (Details)	12 Months Ended
Dec. 31, 2018
Minimum [Member]
Revenue Recognition Contract Terms [Line Items]
Revenue Recognition, Contract Terms	3 years
Maximum [Member]
Revenue Recognition Contract Terms [Line Items]
Revenue Recognition, Contract Terms	5 years

[Line Items] for Revenue Recognition Contract Terms [Table]

No definition available.

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Namespace Prefix:	swch_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration