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Data Type:	xbrli:durationItemType
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Term of deferment period, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

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

Amount of interest on loan forgiven by bank.

No definition available.

Name:	snwv_ForgivenessOfLoanInterestAmount
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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

The amount of loan forgiven by the bank.

No definition available.

Name:	snwv_ForgivenessOfLoanPrincipalAmount
Namespace Prefix:	snwv_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Description of the frequency of periodic payments (monthly, quarterly, annual).

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Contractual interest rate for funds borrowed, under the debt agreement.

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Balance Type:	na
Period Type:	instant

Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format.

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-Publisher FASB
-Name Accounting Standards Codification
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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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Name:	us-gaap_GainsLossesOnExtinguishmentOfDebt
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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Name:	us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

Name:	us-gaap_LoansAndLeasesReceivableNetOfDeferredIncomeAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Carrying value as of the balance sheet date of portion of long-term loans payable due within one year or the operating cycle if longer.

Name:	us-gaap_LoansPayableCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Carrying value as of the balance sheet date of loans payable (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion.