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

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