Quarterly report pursuant to Section 13 or 15(d)

Acquisitions - Narrative (Details)

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Acquisitions - Narrative (Details) - USD ($)
 1 Months Ended 2 Months Ended 3 Months Ended 6 Months Ended
Feb. 16, 2018
Nov. 17, 2017
Dec. 31, 2017
Mar. 31, 2018
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Business Acquisition [Line Items]                
Goodwill     $ (14,292,282)   $ (18,070,283)   $ (18,070,283)  
Cost of product sales       $ 100,000        
Impairment of intangible assets         1,701,875 $ 0 1,701,875 $ 0
Avadel                
Business Acquisition [Line Items]                
Cash $ 1              
Long-term debt acquired 15,075,000              
Contingent consideration 7,900,000              
Goodwill $ (3,778,001)              
Goodwill tax deductible period 15 years              
Pro forma adjustment operating expenses         300,000      
Pro forma adjustment cost of sales         200,000      
Pro forma adjustment sales and marketing expense         100,000      
Inventory       $ 300,000 (1,831,000)      
Fair value of consideration transferred $ 1              
TRx                
Business Acquisition [Line Items]                
Cash   $ 18,900,000            
Goodwill   $ (14,292,282)            
Inventory     $ 200,000          
Cost of product sales         100,000   100,000  
Unregistered shares of common stock issued or issuable as part of acquisition (in shares)   7,534,884            
Shares issued for purchase of business   $ 8,500,000            
Shares issued upon closing (in shares)   5,184,920            
Contingent shares issuable as part of acquisition (in shares)   2,349,968            
Goodwill, expected tax deductible amount   $ 9,200,000            
Fair value of consideration transferred   $ 29,991,052            
General and administrative | Avadel                
Business Acquisition [Line Items]                
Transaction costs         100,000   100,000  
PAI Sales & Marketing Agreement | TRx                
Business Acquisition [Line Items]                
Acquired finite-lived intangible assets, weighted average useful life (in years)   2 years            
Impairment of intangible assets         1,700,000   1,700,000  
Metafolin | Acquired product marketing rights | TRx                
Business Acquisition [Line Items]                
Acquired finite-lived intangible assets, weighted average useful life (in years)   15 years            
Millipred | Acquired product marketing rights | TRx                
Business Acquisition [Line Items]                
Acquired finite-lived intangible assets, weighted average useful life (in years)   4 years            
Ulesfia | Acquired product marketing rights | TRx                
Business Acquisition [Line Items]                
Acquired finite-lived intangible assets, weighted average useful life (in years)   3 years            
Nonrecurring | Level 3 | PAI Sales & Marketing Agreement | TRx                
Business Acquisition [Line Items]                
Fair value of sales and marketing agreement         $ 0   $ 0