Summary of Significant Accounting Policies - Portfolio Energy Credits (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Accounting Policies [Abstract]
PECs, gross	$ 5,352	$ 3,649
Accumulated amortization	(5,352)	(3,508)
PECs, net	$ 0	$ 141

Portfolio Energy Credits, Accumulated Amortization

No definition available.

Name:	swch_PortfolioEnergyCreditsAccumulatedAmortization
Namespace Prefix:	swch_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant