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Note 8 - Stockholders Equity (Details) (USD $)
1 Months Ended 12 Months Ended 0 Months Ended 1 Months Ended
Nov. 29, 2012
Nov. 30, 2012
Dec. 31, 2014
Dec. 31, 2013
Nov. 02, 2012
Nov. 30, 2013
Note 8 - Stockholders Equity (Details) [Line Items]            
Warrants, Expiration Period   5 years        
Proceeds from Issuance of Warrants (in Dollars)     $ 265,298us-gaap_ProceedsFromIssuanceOfWarrants $ 1,246,300us-gaap_ProceedsFromIssuanceOfWarrants    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights 200,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights          
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per share) $ 0.40us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 $ 0.55us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1        
Stock Issued During Period, Shares, Issued for Services 125,000us-gaap_StockIssuedDuringPeriodSharesIssuedForServices          
Stock Issued During Period, Shares, Cashless exercise of warrants     1,925,357ensv_StockIssuedDuringPeriodSharesCashlessExerciseOfWarrants 1,236,456ensv_StockIssuedDuringPeriodSharesCashlessExerciseOfWarrants    
Stock Issued From Cashless Exercise Of Warrants     1,482,041ensv_StockIssuedFromCashlessExerciseOfWarrants 716,028ensv_StockIssuedFromCashlessExerciseOfWarrants    
Stock Issued During Period, Shares, Warrants Cancelled     443,316ensv_StockIssuedDuringPeriodSharesWarrantsCancelled 520,428ensv_StockIssuedDuringPeriodSharesWarrantsCancelled    
Stock Issued During Period, Shares, Warrants Exercised     482,356ensv_StockIssuedDuringPeriodSharesWarrantsExercised 2,266,000ensv_StockIssuedDuringPeriodSharesWarrantsExercised    
Proceeds from Warrant Exercises (in Dollars)     265,298us-gaap_ProceedsFromWarrantExercises 1,246,300us-gaap_ProceedsFromWarrantExercises    
Aggregate Intrinsic Value Of Warrants Exercised (in Dollars)     4,425,344ensv_AggregateIntrinsicValueOfWarrantsExercised 2,662,347ensv_AggregateIntrinsicValueOfWarrantsExercised    
General and Administrative Expense [Member]            
Note 8 - Stockholders Equity (Details) [Line Items]            
Share-Based Compensation Expense, Warrants (in Dollars)       60,046ensv_ShareBasedCompensationExpenseWarrants
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_GeneralAndAdministrativeExpenseMember
   
Common Stock [Member]            
Note 8 - Stockholders Equity (Details) [Line Items]            
Sale of Stock, Price Per Share (in Dollars per share) $ 0.40us-gaap_SaleOfStockPricePerShare
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CommonStockMember
         
Mr. Herman [Member]            
Note 8 - Stockholders Equity (Details) [Line Items]            
Warrants, Expiration Period   5 years        
Due to Related Parties, Noncurrent (in Dollars)         1,477,760us-gaap_DueToRelatedPartiesNoncurrent
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ensv_MrHermanMember
 
Number Of Shares Projected To Be Issued To Convert Debt         4,222,000ensv_NumberOfSharesProjectedToBeIssuedToConvertDebt
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ensv_MrHermanMember
 
Number Of Warrants Projected To Be Issued To Convert Debt         2,111,000ensv_NumberOfWarrantsProjectedToBeIssuedToConvertDebt
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ensv_MrHermanMember
 
Proceeds from Issuance of Warrants (in Dollars)           1,161,050us-gaap_ProceedsFromIssuanceOfWarrants
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ensv_MrHermanMember
Class of Warrant or Right, Number of Securities Called by Warrants or Rights   4,960,714us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ensv_MrHermanMember
       
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per share)   $ 0.55us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ensv_MrHermanMember
       
Private Placement [Member]            
Note 8 - Stockholders Equity (Details) [Line Items]            
Number Of Units Issued To Convert Debt   5,699ensv_NumberOfUnitsIssuedToConvertDebt
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_PrivatePlacementMember
       
Per Unit Price ssued To Convert Debt (in Dollars per share)   $ 350ensv_PerUnitPriceIssuedToConvertDebt
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_PrivatePlacementMember
       
Proceeds from Issuance of Private Placement (in Dollars)   1,994,800us-gaap_ProceedsFromIssuanceOfPrivatePlacement
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_PrivatePlacementMember
       
Number Of Shares Comprised In 1 Unit Issued To Convert Debt (in Dollars)   $ 1,000ensv_NumberOfSharesComprisedIn1UnitIssuedToConvertDebt
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_PrivatePlacementMember
       
Number Of Warrants Comprised In 1 Unit Issued To Convert Debt   500ensv_NumberOfWarrantsComprisedIn1UnitIssuedToConvertDebt
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_PrivatePlacementMember
       
  0.55ensv_ShareBasedCompensationWeightedAverageExercisePriceWarrantsExercisable
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_PrivatePlacementMember
       
Warrants, Expiration Period   5 years        
Number of Shares Issued To Convert Debt   5,699,428ensv_NumberofSharesIssuedToConvertDebt
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_PrivatePlacementMember
       
Number Of Warrants Issued To Convert Debt   2,849,714ensv_NumberOfWarrantsIssuedToConvertDebt
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_PrivatePlacementMember
       
Purchase of Warrants   449,456ensv_PurchaseOfWarrants
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_PrivatePlacementMember
       
Maximum [Member]            
Note 8 - Stockholders Equity (Details) [Line Items]            
Liquidated Damages Percentage       8.00%ensv_LiquidatedDamagesPercentage
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
   
Each Principal of Existing Investor Relations Firm [Member]            
Note 8 - Stockholders Equity (Details) [Line Items]            
Class of Warrant or Right, Number of Securities Called by Warrants or Rights   112,500us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_TitleOfIndividualAxis
= ensv_EachPrincipalOfExistingInvestorRelationsFirmMember
       
Principals of Existing Investor Relations Firm [Member]            
Note 8 - Stockholders Equity (Details) [Line Items]            
Class of Warrant or Right, Number of Securities Called by Warrants or Rights   225,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_TitleOfIndividualAxis
= ensv_PrincipalsOfExistingInvestorRelationsFirmMember