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Income Taxes and Other Taxes Payable (Detail) - Schedule of the Effects of Tax Exemption (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Aggregate dollar effect of tax exemption (in Dollars)	$ 1,504,950	$ 1,180,648
Basic EPS impact	$ 0.10	$ 0.12

X

- Definition

Per share amount effect of a income tax exemption on basic earnings per share.

+ References

No definition available.

+ Details

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Namespace Prefix:	stvs_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The portion of the difference between total income tax expense or benefit as reported in the Income Statement for the period and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to income that is exempt from income taxes under enacted tax laws.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 12

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 13

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration