XML 54 R33.htm IDEA: XBRL DOCUMENT v3.19.3

Commitments and Contingencies - Additional Information (Details)	9 Months Ended
	Sep. 30, 2019
Maximum
Commitments And Contingencies [Line Items]
Agreement termination notice period	1 year

X

- Definition

Agreement termination notice period.

+ References

No definition available.

+ Details

Name:	dtil_AgreementTerminationNoticePeriod
Namespace Prefix:	dtil_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line items represent commitments and contingencies.

+ References

No definition available.

+ Details

Name:	dtil_CommitmentsAndContingenciesLineItems
Namespace Prefix:	dtil_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: