Summary of Significant Accounting Policies, Contract Liabilities (Details)	12 Months Ended
Dec. 31, 2022
Contract Liabilities [Abstract]
Initial warranty period of device product	1 year

Initial warranty period of device product sales, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	snwv_InitialWarrantyPeriodOfDeviceProduct
Namespace Prefix:	snwv_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration