XML 92 R76.htm IDEA: XBRL DOCUMENT
v3.19.1

INCOME TAXES (Summary of Operating Loss Carryforwards) (Details) - Internal Revenue Service (IRS) [Member] - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Operating Loss Carryforwards | $ 9,984 | $ 28,065
Tax Year 2036 [Member] |  |
Operating Loss Carryforwards |  | 17,781
Tax Year 2037 [Member] |  |
Operating Loss Carryforwards |  | $ 10,284
Unlimited life |  |
Operating Loss Carryforwards | $ 9,984 |

X
- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32559-109319 + Details
Name: | us-gaap_OperatingLossCarryforwards
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_IncomeTaxAuthorityNameAxis=us-gaap_InternalRevenueServiceIRSMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=prpo_TaxYear2036Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=prpo_TaxYear2037Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=prpo_UnlimitedLifeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |