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Consolidated Balance Sheets (USD $)
Feb. 28, 2015
Feb. 28, 2014
Current Assets:    
Cash and cash equivalents $ 2,562,782us-gaap_CashAndCashEquivalentsAtCarryingValue $ 3,232,021us-gaap_CashAndCashEquivalentsAtCarryingValue
Marketable Securities 1,652,485us-gaap_MarketableSecuritiesCurrent 630,794us-gaap_MarketableSecuritiesCurrent
Accounts receivable (less allowance of $43,047 and $32,000, respectively) 1,029,250us-gaap_AccountsReceivableNetCurrent 860,296us-gaap_AccountsReceivableNetCurrent
Inventories, net 2,059,177us-gaap_InventoryNet 1,674,815us-gaap_InventoryNet
Prepaid expenses and other current assets 94,487us-gaap_PrepaidExpenseAndOtherAssetsCurrent 160,373us-gaap_PrepaidExpenseAndOtherAssetsCurrent
Total current assets 7,398,181us-gaap_AssetsCurrent 6,558,299us-gaap_AssetsCurrent
Land 250,000us-gaap_Land 250,000us-gaap_Land
Buildings, net 2,015,625SOTK_BuildingsAndImprovementsNet 2,071,875SOTK_BuildingsAndImprovementsNet
Equipment, furnishings and leasehold improvements, net 661,411SOTK_EquipmentFurnishingsLeaseholdImprovementsNet 637,138SOTK_EquipmentFurnishingsLeaseholdImprovementsNet
Intangible assets, net 175,412us-gaap_IntangibleAssetsNetExcludingGoodwill 171,828us-gaap_IntangibleAssetsNetExcludingGoodwill
Deferred tax asset 90,021us-gaap_DeferredTaxAssetsNetNoncurrent 90,021us-gaap_DeferredTaxAssetsNetNoncurrent
TOTAL ASSETS 10,590,650us-gaap_Assets 9,779,161us-gaap_Assets
Current Liabilities:    
Accounts payable 584,963us-gaap_AccountsPayableCurrent 556,194us-gaap_AccountsPayableCurrent
Accrued expenses 691,937us-gaap_AccruedLiabilitiesCurrent 565,121us-gaap_AccruedLiabilitiesCurrent
Customer deposits 462,168us-gaap_CustomerAdvancesAndDepositsCurrent 362,846us-gaap_CustomerAdvancesAndDepositsCurrent
Current maturities of long term debt 158,184us-gaap_LongTermDebtCurrent 191,466us-gaap_LongTermDebtCurrent
Income taxes payable 229,927us-gaap_AccruedIncomeTaxesCurrent 129,398us-gaap_AccruedIncomeTaxesCurrent
Total current liabilities 2,127,179us-gaap_LiabilitiesCurrent 1,805,025us-gaap_LiabilitiesCurrent
Long term debt, less current maturities 1,319,737us-gaap_LongTermDebtNoncurrent 1,479,058us-gaap_LongTermDebtNoncurrent
Total liabilities 3,446,916us-gaap_Liabilities 3,284,083us-gaap_Liabilities
Commitments and Contingencies      
Stockholders' Equity    
Common stock, $.01 par value; 25,000,000 shares authorized, 14,933,107 and 14,708,518 issued and outstanding, respectively 149,331us-gaap_CommonStockValue 147,085us-gaap_CommonStockValue
Additional paid-in capital 8,766,160us-gaap_AdditionalPaidInCapital 8,725,883us-gaap_AdditionalPaidInCapital
Accumulated deficit (1,771,757)us-gaap_RetainedEarningsAccumulatedDeficit (2,377,890)us-gaap_RetainedEarningsAccumulatedDeficit
Total stockholders' equity 7,143,734us-gaap_StockholdersEquity 6,495,078us-gaap_StockholdersEquity
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY $ 10,590,650us-gaap_LiabilitiesAndStockholdersEquity $ 9,779,161us-gaap_LiabilitiesAndStockholdersEquity