Name:	pasg_AccruedDivestitureFeesCurrent
Namespace Prefix:	pasg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The carrying balance as of the balance sheet of accrued expenses and other current liabilities.

No definition available.

Name:	pasg_AccruedExpensesAndOtherCurrentLiabilities
Namespace Prefix:	pasg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The carrying balance as of the balance sheet of accrued research and development expense.

No definition available.

Name:	pasg_AccruedResearchAndDevelopmentExpense
Namespace Prefix:	pasg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- References

No definition available.

Name:	us-gaap_AccruedLiabilitiesAndOtherLiabilitiesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Carrying value as of the balance sheet date of obligations incurred through that date and payable for professional fees, such as for legal and accounting services received. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(20))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Name:	us-gaap_AccruedProfessionalFeesCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).