Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements - Narrative (Details)

v3.19.1
Fair Value Measurements - Narrative (Details)
 12 Months Ended
Feb. 16, 2018
USD ($)
Dec. 31, 2018
USD ($)
$ / shares
class_of_stock
Dec. 31, 2017
USD ($)
class_of_stock
Sep. 30, 2018
$ / shares
Nov. 17, 2017
USD ($)
Dec. 31, 2015
shares
Oct. 31, 2015
shares
Dec. 31, 2014
shares
Level 3 Valuation                
Change in fair value   $ (58,366) $ 0          
Number of changes in valuation techniques | class_of_stock   0 0          
Amount of transfers of assets from level 2 to level 1   $ 0 $ 0          
Amount of transfers of assets from level 1 to level 2   0 0          
Common stock                
Level 3 Valuation                
Number of shares available under warrant (in shares) | shares             22,328  
Avadel                
Level 3 Valuation                
Product royalty 15.00%              
Royalty obligation $ 12,500,000              
Royalty obligation fair value   $ 7,800,000            
Contingent consideration $ 7,900,000              
Avadel | Measurement input risk free interest rate                
Level 3 Valuation                
Royalty obligation measurement input   0.026            
Avadel | Measurement input counterparty credit risk                
Level 3 Valuation                
Contingent consideration liability measurement input   0.055            
Avadel | Measurement input discount rate                
Level 3 Valuation                
Royalty obligation measurement input   0.081            
TRx                
Level 3 Valuation                
Contingent consideration         $ 1,366,633      
Milestone One | TRx                
Level 3 Valuation                
Contingent consideration   $ 0     3,000,000      
Gross profit   12,600,000            
Milestone Two | TRx                
Level 3 Valuation                
Contingent consideration   $ 900,000     2,000,000      
Contingent consideration expected time to milestone   6 months            
Milestone Two | TRx | Measurement input risk free interest rate                
Level 3 Valuation                
Contingent consideration liability measurement input   0.024            
Milestone Two | TRx | Measurement input counterparty credit risk                
Level 3 Valuation                
Contingent consideration liability measurement input   0.055            
Milestone Two | TRx | Measurement input probability of milestone success                
Level 3 Valuation                
Contingent consideration liability measurement input   0.450            
Milestone Two | TRx | Measurement input discount rate                
Level 3 Valuation                
Contingent consideration liability measurement input   0.079            
Milestone Three | TRx                
Level 3 Valuation                
Contingent consideration   $ 400,000     $ 2,000,000      
Contingent consideration expected time to milestone   1 year 6 months            
Milestone Three | TRx | Measurement input risk free interest rate                
Level 3 Valuation                
Contingent consideration liability measurement input   0.025            
Milestone Three | TRx | Measurement input counterparty credit risk                
Level 3 Valuation                
Contingent consideration liability measurement input   0.055            
Milestone Three | TRx | Measurement input probability of milestone success                
Level 3 Valuation                
Contingent consideration liability measurement input   0.225            
Milestone Three | TRx | Measurement input discount rate                
Level 3 Valuation                
Contingent consideration liability measurement input   0.080            
Level 2                
Level 3 Valuation                
Estimated fair value of debt   $ 14,900,000            
Level 3                
Level 3 Valuation                
Change in fair value   $ (33,356) (29,624)          
Warrant liability | Level 3                
Level 3 Valuation                
Expected life   1 year 9 months 18 days            
Warrant liability | Level 3 | Measurement input price volatility                
Level 3 Valuation                
Warrants and rights outstanding measurement input   0.50            
Warrant liability | Level 3 | Measurement input risk free interest rate                
Level 3 Valuation                
Warrants and rights outstanding measurement input   0.0251            
Warrant liability | Level 3 | Measurement input strike price (in dollars per share)                
Level 3 Valuation                
Warrants and rights outstanding measurement input | $ / shares   8.40            
Warrant liability | Level 3 | Measurement input share price (in dollars per share)                
Level 3 Valuation                
Warrants and rights outstanding measurement input | $ / shares       3.23        
Unit purchase option liability | Level 3                
Level 3 Valuation                
Expected life   1 year 9 months 18 days            
Change in fair value   $ 19,775 $ (26,940)          
Unit purchase option liability | Level 3 | Measurement input price volatility                
Level 3 Valuation                
Warrants and rights outstanding measurement input   0.50            
Unit purchase option liability | Level 3 | Measurement input risk free interest rate                
Level 3 Valuation                
Warrants and rights outstanding measurement input   0.0251            
Unit purchase option liability | Level 3 | Measurement input strike price (in dollars per share)                
Level 3 Valuation                
Warrants and rights outstanding measurement input | $ / shares   7.47            
Unit purchase option liability | Level 3 | Measurement input share price (in dollars per share)                
Level 3 Valuation                
Warrants and rights outstanding measurement input | $ / shares   3.23            
Common Stock Warrants                
Level 3 Valuation                
Number of shares available under warrant (in shares) | shares           40,000    
Series B convertible preferred stock | Preferred Stock                
Level 3 Valuation                
Number of shares available under warrant (in shares) | shares               625,208