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Revolving Line of Credit (Details Narrative) (Revolving Line of Credit, USD $) | 12 Months Ended
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Feb. 28, 2015
Revolving Line of Credit |
Line of credit description | The Company has a $750,000 revolving line of credit at prime which was 3.25% at February 28, 2015. The line of credit is collateralized by all of the assets of the Company, except for the land and buildings. The line of credit is payable on demand and must be retired for a 30 day period once annually. If the Company fails to perform the 30 day annual pay down or if the bank elects to terminate the credit line, the bank may at its option convert the outstanding balance to a 36 month term note with payments including interest in 36 equal installments.
Outstanding balance | $ 0 us-gaap_LineOfCreditFacilityAmountOutstanding / us-gaap_ShortTermDebtTypeAxis = us-gaap_LineOfCreditMember
Unused credit line | $ 750,000 SOTK_LineOfCreditFacilityUnusedAmount / us-gaap_ShortTermDebtTypeAxis = us-gaap_LineOfCreditMember

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- Definition No authoritative reference available. + References No definition available. + Details
Name: | SOTK_LineOfCreditFacilityUnusedAmount
Namespace Prefix: | SOTK_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Amount borrowed under the credit facility as of the balance sheet date. + References No definition available. + Details
Name: | us-gaap_LineOfCreditFacilityAmountOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Description of the short-term debt arrangement, and disclosures pertaining to the underlying arrangements, including repayment terms, interest rates, restrictions on assets and activities, debt covenants, and other matters important to users of the financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_ShortTermDebtTerms
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration