Significant Accounting Policies - Intangible Assets (Details Narrative) (USD $)	May 31, 2013	Feb. 28, 2013
Notes to Financial Statements
Accumulated amortization of intangible assets	$ 98,230	$ 95,634
Annual Amortization Expense of Intangible Assets For the Next Five Years
Annual amortization expense this year	9,600
Annual amortization expense year two	9,600
Annual amortization expense year three	9,600
Annual amortization expense year four	9,600
Annual amortization expense year five	$ 9,600

Name:	SOTK_NotesToFinancialStatementsAbstract
Namespace Prefix:	SOTK_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

+ Details

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

- Definition

Amount of amortization expense expected to be recognized during the next fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References