Represents Contract with Customer Transaction Cost

No definition available.

Name:	pulm_ContractWithCustomerTransactionCost
Namespace Prefix:	pulm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents deferred revenue revenue recognition terms.

+ References

No definition available.

+ Details

Name:	pulm_DeferredRevenueRevenueRecognitionTerms
Namespace Prefix:	pulm_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents development terms relating to cost allocation etc.

+ References

No definition available.

+ Details

Name:	pulm_DevelopmentCostsAllocationTerms
Namespace Prefix:	pulm_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Receipt of upfront fee.

+ References

No definition available.

+ Details

Name:	pulm_ProceedsFromUpfrontFee
Namespace Prefix:	pulm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of deferred income and obligation to transfer product and service to customer for which consideration has been received or is receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(5))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- Definition

Amount of deferred income and obligation to transfer product and service to customer for which consideration has been received or is receivable, classified as current.

+ References

+ Details

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

- Definition

Amount of revenue recognized that was previously reported as deferred or unearned revenue.

+ References

No definition available.

+ Details

Name:	us-gaap_DeferredRevenueRevenueRecognized1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	dei_LegalEntityAxis=pulm_CiplaTechnologiesLlcMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=pulm_CiplaAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=pulm_ResearchAndDevelopmentServiceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=pulm_IrrevocableLicenseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Collaborations (Detail) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
Collaborations (Detail) - USD ($) $ in Thousands	Apr. 15, 2019	Sep. 30, 2019	Jun. 30, 2019	Sep. 30, 2019	Dec. 31, 2018
Deferred Revenue Current		$ 9,304		$ 9,304	$ 0
Cipla Technologies, LLC [Member] \| Cipla Agreement [Member]
Proceeds from up front fee	$ 22,000		$ 22,000	22,000
Development costs allocation terms	After the Initial Development Funding is depleted, the Company and Cipla will each be responsible for 50% of the development costs actually incurred (the “Co-Development Phase”).
Deferred Revenue		15,775		15,775
Deferred Revenue Current		9,304		9,304
Contract with customer transaction cost				$ 22,000
Deferred Revenue Revenue Recognition Terms				3 years
Cipla Technologies, LLC [Member] \| Cipla Agreement [Member] \| Research And Development Service [Member]
Proceeds from up front fee				$ 12,000
Revenue recognized		1,154		4,929
Cipla Technologies, LLC [Member] \| Cipla Agreement [Member] \| Irrevocable License [Member]
Proceeds from up front fee				10,000
Revenue recognized		$ 252		$ 1,296