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Segment Information (Tables) - Segment information (Details) (USD $) | 12 Months Ended
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Feb. 28, 2015 | Feb. 28, 2014
Net Sales | $ 10,849,475 us-gaap_Revenues | $ 10,278,938 us-gaap_Revenues
Rental Expense | 162,522 us-gaap_OwnedPropertyManagementCosts | 154,792 us-gaap_OwnedPropertyManagementCosts
Interest Expense | 64,527 us-gaap_InterestExpense | 110,151 us-gaap_InterestExpense
Net Income (Loss) | 606,133 us-gaap_ProfitLoss | 484,474 us-gaap_ProfitLoss
Assets | 10,590,650 us-gaap_Assets | 9,779,161 us-gaap_Assets
Debt | 1,477,921 us-gaap_LongTermDebt | 1,670,524 us-gaap_LongTermDebt
Ultrasonic Spraying |  |
Net Sales | 10,757,825 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = SOTK_OperatingSegments1Member | 10,202,273 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = SOTK_OperatingSegments1Member
Rental Expense | 196,298 us-gaap_OwnedPropertyManagementCosts / us-gaap_StatementBusinessSegmentsAxis = SOTK_OperatingSegments1Member | 140,788 us-gaap_OwnedPropertyManagementCosts / us-gaap_StatementBusinessSegmentsAxis = SOTK_OperatingSegments1Member
Interest Expense | 1,223 us-gaap_InterestExpense / us-gaap_StatementBusinessSegmentsAxis = SOTK_OperatingSegments1Member | 2,411 us-gaap_InterestExpense / us-gaap_StatementBusinessSegmentsAxis = SOTK_OperatingSegments1Member
Net Income (Loss) | 544,011 us-gaap_ProfitLoss / us-gaap_StatementBusinessSegmentsAxis = SOTK_OperatingSegments1Member | 529,553 us-gaap_ProfitLoss / us-gaap_StatementBusinessSegmentsAxis = SOTK_OperatingSegments1Member
Assets | 8,076,724 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = SOTK_OperatingSegments1Member | 7,268,871 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = SOTK_OperatingSegments1Member
Debt | 20,542 us-gaap_LongTermDebt / us-gaap_StatementBusinessSegmentsAxis = SOTK_OperatingSegments1Member | 81,165 us-gaap_LongTermDebt / us-gaap_StatementBusinessSegmentsAxis = SOTK_OperatingSegments1Member
Rental Real Estate Operations |  |
Net Sales | 287,948 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = SOTK_OperatingSegments2Member | 217,453 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = SOTK_OperatingSegments2Member
Rental Expense | 162,522 us-gaap_OwnedPropertyManagementCosts / us-gaap_StatementBusinessSegmentsAxis = SOTK_OperatingSegments2Member | 154,792 us-gaap_OwnedPropertyManagementCosts / us-gaap_StatementBusinessSegmentsAxis = SOTK_OperatingSegments2Member
Interest Expense | 63,304 us-gaap_InterestExpense / us-gaap_StatementBusinessSegmentsAxis = SOTK_OperatingSegments2Member | 107,740 us-gaap_InterestExpense / us-gaap_StatementBusinessSegmentsAxis = SOTK_OperatingSegments2Member
Net Income (Loss) | 62,122 us-gaap_ProfitLoss / us-gaap_StatementBusinessSegmentsAxis = SOTK_OperatingSegments2Member | (45,079)us-gaap_ProfitLoss / us-gaap_StatementBusinessSegmentsAxis = SOTK_OperatingSegments2Member
Assets | 2,513,924 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = SOTK_OperatingSegments2Member | 2,510,290 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = SOTK_OperatingSegments2Member
Debt | 1,457,379 us-gaap_LongTermDebt / us-gaap_StatementBusinessSegmentsAxis = SOTK_OperatingSegments2Member | 1,589,360 us-gaap_LongTermDebt / us-gaap_StatementBusinessSegmentsAxis = SOTK_OperatingSegments2Member
Eliminations |  |
Net Sales | 196,298 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = us-gaap_ConsolidationEliminationsMember | 140,788 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = us-gaap_ConsolidationEliminationsMember
Rental Expense | (196,298)us-gaap_OwnedPropertyManagementCosts / us-gaap_StatementBusinessSegmentsAxis = us-gaap_ConsolidationEliminationsMember | (140,788)us-gaap_OwnedPropertyManagementCosts / us-gaap_StatementBusinessSegmentsAxis = us-gaap_ConsolidationEliminationsMember
Consolidated |  |
Net Sales | 10,849,475 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = us-gaap_ConsolidatedEntitiesMember | 10,278,938 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = us-gaap_ConsolidatedEntitiesMember
Rental Expense | 162,522 us-gaap_OwnedPropertyManagementCosts / us-gaap_StatementBusinessSegmentsAxis = us-gaap_ConsolidatedEntitiesMember | 154,792 us-gaap_OwnedPropertyManagementCosts / us-gaap_StatementBusinessSegmentsAxis = us-gaap_ConsolidatedEntitiesMember
Interest Expense | 64,527 us-gaap_InterestExpense / us-gaap_StatementBusinessSegmentsAxis = us-gaap_ConsolidatedEntitiesMember | 110,151 us-gaap_InterestExpense / us-gaap_StatementBusinessSegmentsAxis = us-gaap_ConsolidatedEntitiesMember
Net Income (Loss) | 606,133 us-gaap_ProfitLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_ConsolidatedEntitiesMember | 484,474 us-gaap_ProfitLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_ConsolidatedEntitiesMember
Assets | 10,590,650 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_ConsolidatedEntitiesMember | 9,779,161 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_ConsolidatedEntitiesMember
Debt | $ 1,477,922 us-gaap_LongTermDebt / us-gaap_StatementBusinessSegmentsAxis = us-gaap_ConsolidatedEntitiesMember | $ 1,670,525 us-gaap_LongTermDebt / us-gaap_StatementBusinessSegmentsAxis = us-gaap_ConsolidatedEntitiesMember

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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.18) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 7 + Details
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