Represents the ratio in which temporary equity is exchanged for common stock.

No definition available.

Name:	jone_TemporaryEquityConversionOfUnitsToCommonStockRatio
Namespace Prefix:	jone_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

The equivalent per share conversion price of the temporary equity.

+ References

No definition available.

+ Details

Name:	jone_TemporaryEquityConversionPrice
Namespace Prefix:	jone_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

The percentage rate used to calculate dividend payments on temporary equity.

+ References

No definition available.

+ Details

Name:	jone_TemporaryEquityDividendRatePercentage
Namespace Prefix:	jone_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of common shares issuable upon the conversion of the temporary equity.

+ References

No definition available.

+ Details

Name:	jone_TemporaryEquitySharesIssuable
Namespace Prefix:	jone_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of new stock classified as temporary equity issued during the period.

+ References

No definition available.

+ Details

Name:	jone_TemporaryEquityStockIssuedDuringPeriodSharesNewIssues
Namespace Prefix:	jone_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Threshold period of specified consecutive trading days within which common stock price to conversion price of temporary equity must exceed threshold percentage for a specified number of trading days to trigger conversion feature, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	jone_TemporaryEquityThresholdConsecutiveTradingDays
Namespace Prefix:	jone_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Minimum percentage of common stock price to conversion price of temporary equity to determine eligibility of conversion.

+ References

No definition available.

+ Details

Name:	jone_TemporaryEquityThresholdPercentageOfStockPriceTrigger
Namespace Prefix:	jone_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Threshold number of specified trading days that common stock price to conversion price of temporary equity must exceed threshold percentage within a specified consecutive trading period to trigger conversion feature.

+ References

No definition available.

+ Details

Name:	jone_TemporaryEquityThresholdTradingDays
Namespace Prefix:	jone_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash inflow from issuance of preferred stocks identified as being convertible into another form of financial instrument, typically the entity's common stock.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585

+ Details

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

- References

No definition available.

+ Details

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

- Definition

The per share liquidation preference (or restrictions) of stock classified as temporary equity that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.

+ 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 210.5-02.28(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_TemporaryEquityLiquidationPreferencePerShare
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_SeriesAPreferredStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Stockholders' and Mezzanine equity - Mezzanine Equity - General Information (Details) - Series A preferred stock $ / shares in Units, $ in Millions							3 Months Ended
	Jan. 11, 2018 $ / shares	Oct. 09, 2017 $ / shares	Jul. 13, 2017 $ / shares	Apr. 17, 2017 $ / shares	Jan. 19, 2017 $ / shares	Aug. 25, 2016 USD ($) $ / shares shares	Mar. 31, 2018 item
Series A Perpetual Convertible Preferred Stock
Shares issued (in shares) \| shares						1,840,000
Net proceeds from offering \| $						$ 88.3
Dividend rate (as a percent)	8.00%	8.00%	8.00%	8.00%	8.00%	8.00%
Liquidation preference (in dollars per share) \| $ / shares	$ 50.00	$ 50.00	$ 50.00	$ 50.00	$ 50.00	$ 50.00
Conversion ratio						17.0683
Equivalent conversion price (in dollars per share) \| $ / shares						$ 2.93
Shares issuable upon conversion \| shares						31,400,000
Conversion threshold (as a percent)							175.00%
Minimum number of trading days \| item							20
Consecutive trading days							30 days