Note 5 - Long-term Debt (Details) - Summary of Long-term Debt Instruments (Parentheticals) (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Term Loan [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
PNC Term Loan, addition to base rate for Domestic Rate Loans		2.25%
Term Loan [Member]
Debt Instrument [Line Items]
Equipment Loan, Original Principal Balance		$ 11,000,000
Amended Principal Balance		12,428,576
Debt Instrument, Periodic Payment		172,620
PNC Term Loan: Variable interest rate base		4.25%
Real Estate Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment	5,255	5,255
Guarantee Provided By Related Party	100,000	100,000
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	3.75%	3.75%
Debt Instrument, Maturity Date	Oct. 03, 2028	Oct. 03, 2028
Note Payable To Seller Of Heat Waves [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment	3,000	3,000
Mortgage Payable Through February 2017 Without Balloon Payment [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment	4,555	4,555
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	7.25%	7.25%
Mortgage Payable Through February 2015 [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment	1,550	1,550
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	5.90%	5.90%
Debt Instrument, Maturity Date	Feb. 01, 2017	Feb. 01, 2017
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid	$ 88,118	$ 88,118
Note Payable to Vehicle Finance Companies [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate		4.74%
Note Payable to Vehicle Finance Companies [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate		8.20%

The carrying amount of amended principal balance from original balance as of balance sheet.

No definition available.

Name:	ensv_AmendedPrincipalBalance
Namespace Prefix:	ensv_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Carrying amount of original principal balance of equipment loan as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	ensv_EquipmentLoanOriginalPrincipalBalance
Namespace Prefix:	ensv_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of guarantee provided by related party in favor of company.

+ References

No definition available.

+ Details

Name:	ensv_GuaranteeProvidedByRelatedParty
Namespace Prefix:	ensv_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(2))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentMaturityDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of the required periodic payments including both interest and principal payments.

+ 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 210.5-02.22)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 470

-Section 50

-Paragraph 3

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

+ Details

Name:	us-gaap_DebtInstrumentPeriodicPayment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of payment greater than the preceding installment payments to be paid at final maturity date of debt.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentPeriodicPaymentTermsBalloonPaymentToBePaid
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate.

+ References

+ Details

Name:	us-gaap_LongTermDebtPercentageBearingFixedInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_LongtermDebtTypeAxis=ensv_MortgagePayableThroughFebruary2015Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=ensv_MortgagePayableThroughFebruary2017WithoutBalloonPaymentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=ensv_NotePayableToSellerOfHeatWavesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=ensv_NotePayableToVehicleFinanceCompaniesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=ensv_RealEstateLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=ensv_TermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: