XML 62 R51.htm IDEA: XBRL DOCUMENT
v3.10.0.1

STOCKHOLDERS' EQUITY (Schedule of Warrants) (Details) - $ / shares | Jun. 30, 2018 | Mar. 31, 2018
--- | --- | ---
Class of Stock [Line Items] |  |
Underlying shares (in shares) | 6,913,141 |
Warrants Assumed in Merger, Expiring April 2020 [Member] |  |
Class of Stock [Line Items] |  |
Underlying shares (in shares) | 12,487 |
Exercise price (in dollars per share) | $ 120.00 |
Warrants Assumed in Merger, Expiring February 2020 [Member] |  |
Class of Stock [Line Items] |  |
Underlying shares (in shares) | 23,826 |
Exercise price (in dollars per share) | $ 67.20 |
Warrants Assumed in Merger, Expiring December 2020 [Member] |  |
Class of Stock [Line Items] |  |
Underlying shares (in shares) | 4,081 |
Exercise price (in dollars per share) | $ 49.80 |
Warrants Assumed in Merger, Expiring January 2021, Group A [Member] |  |
Class of Stock [Line Items] |  |
Underlying shares (in shares) | 8,952 |
Exercise price (in dollars per share) | $ 36.30 |
Warrants outstanding (in shares) |  | 3,584
Warrants Not Assumed in Merger, Expiring June 2022, Group A [Member] |  |
Class of Stock [Line Items] |  |
Underlying shares (in shares) | 45,600 |
Exercise price (in dollars per share) | $ 2.75 |
Warrants Not Assumed in Merger, Expiring June 2022, Group B [Member] |  |
Class of Stock [Line Items] |  |
Underlying shares (in shares) | 91,429 |
Exercise price (in dollars per share) | $ 7.00 |
Warrants Not Assumed in Merger, Expiring August 2022, Group A [Member] |  |
Class of Stock [Line Items] |  |
Underlying shares (in shares) | 559,000 |
Exercise price (in dollars per share) | $ 0.30 |
Warrants Not Assumed in Merger, Expiring August 2022, Group B [Member] |  |
Class of Stock [Line Items] |  |
Underlying shares (in shares) | 60,000 |
Exercise price (in dollars per share) | $ 3.125 |
Warrants Not Assumed in Merger, Expiring August 2022, Group C [Member] |  |
Class of Stock [Line Items] |  |
Underlying shares (in shares) | 856,446 |
Exercise price (in dollars per share) | $ 10.00 |
Warrants Not Assumed in Merger, Expiring August 2022, Group D [Member] |  |
Class of Stock [Line Items] |  |
Underlying shares (in shares) | 359,999 |
Exercise price (in dollars per share) | $ 0.30 |
Warrants Not Assumed in Merger, Expiring October 2022 Group A [Member] |  |
Class of Stock [Line Items] |  |
Underlying shares (in shares) | 10,000 |
Exercise price (in dollars per share) | $ 0.30 |
Warrants Not Assumed in Merger, Expiring May 2023 [Member] |  |
Class of Stock [Line Items] |  |
Underlying shares (in shares) | 892,857 |
Exercise price (in dollars per share) | $ 0.30 |
Warrants Not Assumed in Merger, Expiring October 2022 Group B [Member] |  |
Class of Stock [Line Items] |  |
Underlying shares (in shares) | 108,112 |
Exercise price (in dollars per share) | $ 7.50 |
Warrants Not Assumed in Merger, Expiring April 2019 [Member] |  |
Class of Stock [Line Items] |  |
Underlying shares (in shares) | 1,824,176 |
Exercise price (in dollars per share) | $ 0.75 |
Warrants Not Assumed in Merger, Expiring April 2023 [Member] |  |
Class of Stock [Line Items] |  |
Underlying shares (in shares) | 1,824,176 |
Exercise price (in dollars per share) | $ 0.75 |
Warrants Not Assumed in Merger, Expiring October 2022 Group C [Member] |  |
Class of Stock [Line Items] |  |
Underlying shares (in shares) | 232,000 |
Exercise price (in dollars per share) | $ 0.75 |
2016 Warrant Liability [Member] |  |
Class of Stock [Line Items] |  |
Warrants outstanding (in shares) | 5,368 | 5,368

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
- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(4)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
Name: | us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
Name: | us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
Name: | us-gaap_ClassOfWarrantOrRightOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=prpo_WarrantsAssumedInMergerExpiringApril2020Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=prpo_WarrantsAssumedInMergerExpiringFebruary2020Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=prpo_WarrantsAssumedInMergerExpiringDecember2020Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=prpo_WarrantsAssumedInMergerExpiringJanuary2021GroupMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=prpo_WarrantsNotAssumedInMergerExpiringJune2022GroupMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=prpo_WarrantsNotAssumedInMergerExpiringJune2022GroupBMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=prpo_WarrantsNotAssumedInMergerExpiringAugust2022GroupMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=prpo_WarrantsNotAssumedInMergerExpiringAugust2022GroupBMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=prpo_WarrantsNotAssumedInMergerExpiringAugust2022GroupCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=prpo_WarrantsNotAssumedInMergerExpiringAugust2022GroupDMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=prpo_WarrantsNotAssumedInMergerExpiringOctober2022Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=prpo_WarrantsNotAssumedInMergerExpiringMay2023Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=prpo_WarrantsNotAssumedInMergerExpiringOctober2022GroupBMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=prpo_WarrantsNotAssumedInMergerExpiringApril2019Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=prpo_WarrantsNotAssumedInMergerExpiringApril2023Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=prpo_WarrantsNotAssumedInMergerExpiringOctober2022GroupCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByLiabilityClassAxis=prpo_A2016WarrantLiabilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |