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v3.23.1

SUBSEQUENT EVENTS (Details) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended
--- | --- | ---
Apr. 30, 2023 | Mar. 31, 2023
Subsequent Event [Line Items] |  |
Issuance of common stock under the Sales Agreement, net |  | $ 14,233
Stock issuance proceeds |  | $ 14,233
Subsequent Event |  |
Subsequent Event [Line Items] |  |
Issuance of common stock under the Sales Agreement, net (in shares) | 3,412,268 |
Stock issuance proceeds | $ 7,900 |

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- Definition Stock Issued During Period, Shares, Sales Agreement + References No definition available. + Details
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Namespace Prefix: | plx_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- Definition Equity impact of the value of new stock issued during the period. Includes shares issued in a sales agreement. + References No definition available. + Details
Name: | plx_StockIssuedDuringPeriodValueSalesAgreement
Namespace Prefix: | plx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The cash inflow from the additional capital contribution to the entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3255-108585 + Details
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Period Type: | duration

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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |