Collaborative arrangement revenues and expense sharing percentage.

No definition available.

Name:	plx_CollaborativeArrangementRevenuesExpensesSharingPercentage
Namespace Prefix:	plx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the percentage of adult Gaucher patients treated with Uplyso.

+ References

No definition available.

+ Details

Name:	plx_PercentageOfAdultGaucherPatientsTreatedWithUplyso
Namespace Prefix:	plx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount received in exchange for rights to royalties.

+ References

No definition available.

+ Details

Name:	plx_ProceedsFromExchangeForRightsToRoyalties
Namespace Prefix:	plx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- References

No definition available.

+ Details

Name:	plx_SignificantAccountingPoliciesLineItems
Namespace Prefix:	plx_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount represents an order for supply in year 2017.

+ References

No definition available.

+ Details

Name:	plx_SupplyCommitmentInYear2017
Namespace Prefix:	plx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

+ Details

Name:	us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Face amount or stated value per share of common stock.

+ 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(29))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- Details

Name:	us-gaap_StatementGeographicalAxis=country_BR
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=plx_BrazilAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementScenarioAxis=us-gaap_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=plx_PfizerAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CounterpartyNameAxis=plx_PfizerIncorporationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=plx_ProtalixBioTherapeuticsIncorporationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=plx_AmendedPfizerAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended		6 Months Ended
	Oct. 31, 2015	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2017
Significant Accounting Policies [Line Items]
Common Stock, Par or Stated Value Per Share		$ 0.001	$ 0.001	$ 0.001	$ 0.001
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		5,059,186	19,586,488	74,087,411	19,617,149
Brazil [Member]
Significant Accounting Policies [Line Items]
Percentage of Adult Gaucher Patients Treated with Uplyso				10.00%
Brazil Agreement [Member] \| Scenario, Forecast [Member]
Significant Accounting Policies [Line Items]
Supply Commitment In Year 2017						$ 24.3
Pfizer Agreement [Member]
Significant Accounting Policies [Line Items]
Proceeds From Exchange For Rights To Royalties	$ 36.0
Pfizer Agreement [Member] \| Pfizer Incorporation [Member]
Significant Accounting Policies [Line Items]
Collaborative Arrangement Revenues and Expenses Sharing Percentage	60.00%
Pfizer Agreement [Member] \| Protalix Bio Therapeutics Incorporation [Member]
Significant Accounting Policies [Line Items]
Collaborative Arrangement Revenues and Expenses Sharing Percentage	40.00%
Amended Pfizer Agreement [Member] \| Protalix Bio Therapeutics Incorporation [Member] \| Brazil [Member]
Significant Accounting Policies [Line Items]
Collaborative Arrangement Revenues and Expenses Sharing Percentage	100.00%