The number of warrants or rights exercised during period.

No definition available.

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Namespace Prefix:	ensv_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Exercise price per share of warrants or rights exercised during period.

+ References

No definition available.

+ Details

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Namespace Prefix:	ensv_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash inflow associated with the amount received from holders exercising their stock warrants.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585

+ Details

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

- Definition

Value of input used to measure outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Details

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- Details

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- Details

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- Details

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- Details

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Note 8 - Fair Value Measurements (Details Textual)		12 Months Ended
Note 8 - Fair Value Measurements (Details Textual)	Jun. 29, 2018 USD ($) $ / shares shares	Dec. 31, 2017 shares	Dec. 31, 2018
Cross River Partners, L.P. [Member]
Class of Warrant or Right, Exercised During Period \| shares	1,612,902	112,500
Class of Warrant or Right, Exercised During Period, Exercise Price \| $ / shares	$ 0.005
Proceeds from Warrant Exercises \| $	$ 500,000
Measurement Input, Risk Free Interest Rate [Member]
Warrants and Rights Outstanding, Measurement Input			0.0214
Measurement Input, Expected Dividend Rate [Member]
Warrants and Rights Outstanding, Measurement Input			0
Measurement Input, Expected Term [Member]
Warrants and Rights Outstanding, Measurement Input			4.49
Measurement Input, Price Volatility [Member]
Warrants and Rights Outstanding, Measurement Input			0.8958