XML 56 R42.htm IDEA: XBRL DOCUMENT
v3.21.1

Related Party Transactions (Details Narrative) - $ / shares |  | 12 Months Ended |
--- | --- | --- | ---
Feb. 13, 2020 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Number of stock options granted |  | 1,762,495 | 126,567 |
Stock options outstanding weighted average exercise price |  | $ 1.47 | $ 1.34 | $ 1.36
Option term |  | 6 years 7 days | 7 years 2 months 12 days |
Related Party [Member] |  |  |  |
Number of stock options granted | 50,000 |  |  |
Stock options outstanding weighted average exercise price | $ 1.75 |  |  |
Option term | 48 months |  |  |

X
- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_TitleOfIndividualAxis=PTIX_RelatedPartyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |