Warrants - Common Stock Warrants Issued in Pulmatrix Operating Private Placement - Additional Information (Detail) - Jun. 30, 2015 - USD ($)	Total
Pulmatrix Operating [Member]
Class of Warrant or Right [Line Items]
Share price	$ 10.00
Average daily trading volume	40,000
Pulmatrix Operating [Member] \| Maximum [Member]
Class of Warrant or Right [Line Items]
Proceed from strategic license agreement	$ 20,000,000
Gross proceeds from issuance of securities	$ 20,000,000
Pulmatrix Operating [Member] \| Sixty Consecutive Trading Days [Member]
Class of Warrant or Right [Line Items]
Share price	$ 12.50
Pulmatrix Operating [Member] \| Minimum [Member]
Class of Warrant or Right [Line Items]
Percentage of weighted average price of common stock	150.00%
Pulmatrix Operating [Member] \| Thirty Consecutive Trading Days [Member]
Class of Warrant or Right [Line Items]
Average daily trading volume	80,000
Consideration for unexercised portion of the warrant per share of common stock	$ 0.001
Private Placement Warrants [Member]
Class of Warrant or Right [Line Items]
Warrants Outstanding	3,190,030
Exercise price per share of warrants	$ 7.563

Average daily trading volume, shares.

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- Definition

Consideration for unexercised portion of the warrant per share.

+ References

No definition available.

+ Details

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- Definition

Percentage of weighted average price of common stock.

+ References

No definition available.

+ Details

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- Definition

Proceeds from license agreement.

+ References

No definition available.

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- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(i)(4))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Number of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(i))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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- Definition

The cash inflow associated with the amount received from entity's raising of capital via private rather than public placement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 14

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3255-108585

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- Definition

Price of a single share of a number of saleable stocks of a company.

+ References

No definition available.

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