XML 110 R94.htm IDEA: XBRL DOCUMENT
v3.19.1

STOCKHOLDERS; EQUITY (Deemed Dividends) (Details) - USD ($) | 1 Months Ended | 12 Months Ended
--- | --- | ---
Nov. 30, 2018 | Apr. 30, 2018 | Dec. 31, 2018 | Dec. 31, 2017
Class of Stock [Line Items] |  |  |  |
Amount Recorded |  |  | $ 4,222,000 | $ 12,431,000
2018 Purchase Agreement | Deemed Dividend A |  |  |  |
Class of Stock [Line Items] |  |  |  |
Amount Recorded |  |  | 1,358,000 |
2018 Purchase Agreement | Deemed Dividend E |  |  |  |
Class of Stock [Line Items] |  |  |  |
Amount Recorded |  |  | 829,000 |
2018 Purchase Agreement | Deemed Dividend G |  |  |  |
Class of Stock [Line Items] |  |  |  |
Amount Recorded |  |  | 62,000 |
2018 Purchase Agreement | Deemed Dividend J |  |  |  |
Class of Stock [Line Items] |  |  |  |
Amount Recorded |  |  | 8,000 |
2018 Purchase Agreement | Deemed Dividend R |  |  |  |
Class of Stock [Line Items] |  |  |  |
Amount Recorded |  |  | 58,000 |
2018 Inducement Agreement | Deemed Dividend B |  |  |  |
Class of Stock [Line Items] |  |  |  |
Amount Recorded |  |  | 40,000 |
2018 Inducement Agreement | Deemed Dividend F |  |  |  |
Class of Stock [Line Items] |  |  |  |
Amount Recorded |  |  | 1,154,000 |
2018 Inducement Agreement | Deemed Dividend K |  |  |  |
Class of Stock [Line Items] |  |  |  |
Amount Recorded |  |  | 5,000 |
2018 Note Agreement | Deemed Dividend C |  |  |  |
Class of Stock [Line Items] |  |  |  |
Amount Recorded |  |  | 216,000 |
2018 Note Agreement | Deemed Dividend H |  |  |  |
Class of Stock [Line Items] |  |  |  |
Amount Recorded |  |  | 63,000 |
2018 Note Agreement | Deemed Dividend L |  |  |  |
Class of Stock [Line Items] |  |  |  |
Amount Recorded |  | $ 10,000 | 10,000 |
2018 Note Agreement | Deemed Dividend P |  |  |  |
Class of Stock [Line Items] |  |  |  |
Amount Recorded |  | $ 1,000 |  |
2018 Note Agreement | Deemed Dividend S |  |  |  |
Class of Stock [Line Items] |  |  |  |
Amount Recorded |  |  | 45,000 |
2018 Note Agreement | Deemed Dividend M |  |  |  |
Class of Stock [Line Items] |  |  |  |
Amount Recorded | $ 4,000 |  |  |
2018 Note Agreement | Deemed Dividend Q |  |  |  |
Class of Stock [Line Items] |  |  |  |
Amount Recorded | $ 1,000 |  |  |
Amendment Agreement | Deemed Dividend D |  |  |  |
Class of Stock [Line Items] |  |  |  |
Amount Recorded |  |  | 361,000 |
Amendment Agreement | Deemed Dividend I |  |  |  |
Class of Stock [Line Items] |  |  |  |
Amount Recorded |  |  | 5,000 |
Amendment Agreement | Deemed Dividend M |  |  |  |
Class of Stock [Line Items] |  |  |  |
Amount Recorded |  |  | 4,000 |
Amendment Agreement | Deemed Dividend T |  |  |  |
Class of Stock [Line Items] |  |  |  |
Amount Recorded |  |  | $ 4,000 |
Series A Senior Stock Issuance | Deemed Dividend i |  |  |  |
Class of Stock [Line Items] |  |  |  |
Amount Recorded |  |  |  | 5,248,000
August 2017 Offering | Deemed Dividend ii |  |  |  |
Class of Stock [Line Items] |  |  |  |
Amount Recorded |  |  |  | 1,367,000
August 2017 Offering | Deemed Dividend iii |  |  |  |
Class of Stock [Line Items] |  |  |  |
Amount Recorded |  |  |  | 2,385,000
August 2017 Offering | Deemed Dividend vi |  |  |  |
Class of Stock [Line Items] |  |  |  |
Amount Recorded |  |  |  | 12,000
Series C Preferred Offering | Deemed Dividend iv |  |  |  |
Class of Stock [Line Items] |  |  |  |
Amount Recorded |  |  |  | 1,968,000
Series C Preferred Offering | Deemed Dividend v |  |  |  |
Class of Stock [Line Items] |  |  |  |
Amount Recorded |  |  |  | 1,211,000
Series C Preferred Offering | Deemed Dividend vii |  |  |  |
Class of Stock [Line Items] |  |  |  |
Amount Recorded |  |  |  | 211,000
Series C Preferred Offering | Deemed Dividend viii |  |  |  |
Class of Stock [Line Items] |  |  |  |
Amount Recorded |  |  |  | 28,000
Series C Preferred Offering | Deemed Dividend ix |  |  |  |
Class of Stock [Line Items] |  |  |  |
Amount Recorded |  |  |  | $ 1,000

X
- Definition Deemed Dividend + References No definition available. + Details
Name: | prpo_DeemedDividend
Namespace Prefix: | prpo_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ClassOfStockLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DebtInstrumentAxis=prpo_PurchaseAgreement2018Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | prpo_DeemedDividendsAxis=prpo_DeemedDividendMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | prpo_DeemedDividendsAxis=prpo_DeemedDividendEMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | prpo_DeemedDividendsAxis=prpo_DeemedDividendGMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | prpo_DeemedDividendsAxis=prpo_DeemedDividendJMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | prpo_DeemedDividendsAxis=prpo_DeemedDividendRMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=prpo_InducementAgreement2018Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | prpo_DeemedDividendsAxis=prpo_DeemedDividendBMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | prpo_DeemedDividendsAxis=prpo_DeemedDividendFMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | prpo_DeemedDividendsAxis=prpo_DeemedDividendKMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=prpo_NoteAgreement2018Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | prpo_DeemedDividendsAxis=prpo_DeemedDividendCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | prpo_DeemedDividendsAxis=prpo_DeemedDividendHMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | prpo_DeemedDividendsAxis=prpo_DeemedDividendLMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | prpo_DeemedDividendsAxis=prpo_DeemedDividendPMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | prpo_DeemedDividendsAxis=prpo_DeemedDividendSMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | prpo_DeemedDividendsAxis=prpo_DeemedDividendMMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | prpo_DeemedDividendsAxis=prpo_DeemedDividendQMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=prpo_AmendmentAndRestatementAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | prpo_DeemedDividendsAxis=prpo_DeemedDividendDMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | prpo_DeemedDividendsAxis=prpo_DeemedDividendIMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | prpo_DeemedDividendsAxis=prpo_DeemedDividendTMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=prpo_SeriesSeniorStockIssuanceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | prpo_DeemedDividendsAxis=prpo_DeemedDividendOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=prpo_August2017OfferingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | prpo_DeemedDividendsAxis=prpo_DeemedDividendTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | prpo_DeemedDividendsAxis=prpo_DeemedDividendThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | prpo_DeemedDividendsAxis=prpo_DeemedDividendSixMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=prpo_SeriesCPreferredOfferingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | prpo_DeemedDividendsAxis=prpo_DeemedDividendFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | prpo_DeemedDividendsAxis=prpo_DeemedDividendFiveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | prpo_DeemedDividendsAxis=prpo_DeemedDividendSevenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | prpo_DeemedDividendsAxis=prpo_DeemedDividendEightMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | prpo_DeemedDividendsAxis=prpo_DeemedDividendNineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |