XML 56 R45.htm IDEA: XBRL DOCUMENT
v3.20.2

ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Payables and Accruals [Abstract] |  |  |  |
Reduction in Certain Accrued Expense and Accounts Payable |  | $ 0 |  | $ 1,300
Gain on settlement of liability, net | $ 0 |  | $ 0 | $ 1,251

X
- Definition Reduction in Certain Accrued Expense and Accounts Payable + References No definition available. + Details
Name: | prpo_ReductionInCertainAccruedExpenseAndAccountsPayable
Namespace Prefix: | prpo_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of gain (loss) recognized in settlement of litigation and insurance claims. Excludes claims within an insurance entity's normal claims settlement process. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118942415&loc=d3e14326-108349 + Details
Name: | us-gaap_GainLossRelatedToLitigationSettlement
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_PayablesAndAccrualsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration