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Note 5 - Long-term Debt (Details) - Summary of Long-term Debt Instruments (USD $)
Dec. 31, 2014
Dec. 31, 2013
Debt Instrument [Line Items]    
Debt and Capital Lease Obligations $ 1,142,488us-gaap_LongTermDebt $ 13,762,189us-gaap_LongTermDebt
Total current portion (340,520)us-gaap_LongTermDebtCurrent (2,562,141)us-gaap_LongTermDebtCurrent
Long term debt, net of current portion 801,968us-gaap_OtherLongTermDebtNoncurrent 11,200,048us-gaap_OtherLongTermDebtNoncurrent
Term Loan [Member]    
Debt Instrument [Line Items]    
Debt and Capital Lease Obligations   12,083,336us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= ensv_TermLoanMember
Real Estate Loan [Member]    
Debt Instrument [Line Items]    
Debt and Capital Lease Obligations 677,204us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= ensv_RealEstateLoanMember
713,756us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= ensv_RealEstateLoanMember
Note Payable To Seller Of Heat Waves [Member]    
Debt Instrument [Line Items]    
Debt and Capital Lease Obligations 242,000us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= ensv_NotePayableToSellerOfHeatWavesMember
281,000us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= ensv_NotePayableToSellerOfHeatWavesMember
Mortgage Payable Through February 2017 Without Balloon Payment [Member]    
Debt Instrument [Line Items]    
Debt and Capital Lease Obligations 107,967us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= ensv_MortgagePayableThroughFebruary2017WithoutBalloonPaymentMember
153,018us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= ensv_MortgagePayableThroughFebruary2017WithoutBalloonPaymentMember
Mortgage Payable Through February 2017 [Member]    
Debt Instrument [Line Items]    
Debt and Capital Lease Obligations 115,317us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= ensv_MortgagePayableThroughFebruary2017Member
126,750us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= ensv_MortgagePayableThroughFebruary2017Member
Note Payable to Vehicle Finance Companies [Member]    
Debt Instrument [Line Items]    
Debt and Capital Lease Obligations   $ 404,329us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= ensv_NotePayableToVehicleFinanceCompaniesMember