Organization and Nature of the Business (Details)
$ / shares in Units, $ in Millions
 1 Months Ended 3 Months Ended
Feb. 19, 2015
USD ($)
$ / shares
shares
Feb. 02, 2015
Feb. 12, 2014
USD ($)
shares
Oct. 31, 2015
USD ($)
Feb. 28, 2015
USD ($)
Dec. 31, 2013
integer
Sep. 30, 2013
integer
Organization and Nature of the Business              
Reverse stock split   0.079836          
Amount deposited in escrow     $ 18.5        
Cash on hand     80.0        
Escrow deposit received after termination of agreement       $ 3.3      
Price to the public (in dollars per share) | $ / shares $ 12.00            
Net proceeds to the company         $ 51.9    
Underwriting discounts and commissions deducted         4.2    
Offering costs deducted         $ 3.9    
IPO              
Organization and Nature of the Business              
Completed sale (in shares) | shares 5,000,000            
Price to the public (in dollars per share) | $ / shares $ 12.00            
Net proceeds to the company $ 51.9            
Underwriting discounts and commissions deducted 4.2            
Offering costs deducted $ 3.9            
Ikaria | Transition services agreement (TSA)              
Organization and Nature of the Business              
Amount deposited in escrow     $ 18.5        
Length of agreement     24 months        
Escrow deposit received after termination of agreement       $ 3.3      
Spin-Out of Company from Ikaria              
Organization and Nature of the Business              
Number of voting limited liability company interests in the Company for each share of Ikaria common stock held (in shares) | shares     1        
Spin-Out of Company from Ikaria | Ikaria              
Organization and Nature of the Business              
Cash distributed to the company     $ 80.0        
Cash on hand     $ 80.0        
Ikaria              
Organization and Nature of the Business              
Number of operating segments (in segments) | integer           2 2