Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Narrative (Details)

v3.19.2
Commitments and Contingencies - Narrative (Details)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 25, 2019
USD ($)
Apr. 30, 2019
USD ($)
Feb. 19, 2019
USD ($)
Sep. 25, 2018
USD ($)
Mar. 22, 2018
USD ($)
ft²
Dec. 04, 2017
USD ($)
Jan. 09, 2017
USD ($)
May 02, 2016
USD ($)
Mar. 31, 2020
USD ($)
Sep. 30, 2019
USD ($)
Jun. 30, 2019
USD ($)
Mar. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Sep. 30, 2018
USD ($)
Jun. 30, 2018
USD ($)
Mar. 31, 2018
USD ($)
Jun. 30, 2019
USD ($)
employee
Jun. 30, 2018
USD ($)
Dec. 31, 2015
USD ($)
Jul. 30, 2019
USD ($)
Commitments and Contingencies                                        
Lease cost                     $ 10,000.00           $ 20,000.00      
Short-term lease cost                     10,000.00           30,000.00      
Variable lease cost                     $ 10,000.00           $ 10,000.00      
Minimum lease payments, year one                         $ 48,000              
Minimum lease payments, year two                         53,000              
Minimum lease payments, year three                         54,000              
Minimum lease payments, year four                         55,000              
Minimum lease payments, year five                         56,000              
Minimum lease payments, thereafter                         5,000              
Weighted average remaining term                     4 years 8 months 12 days           4 years 8 months 12 days      
Operating lease, weighted average discount rate (percent)                     9.60%           9.60%      
Payments to HPI over three-year period               $ 750,000                        
Payments for research and development agreement               $ 1,000,000.0             $ 1,000,000.0          
HPI out-licensing agreement term               3 years                        
Research and development                     $ 2,099,000       4,231,000   $ 5,031,000 $ 5,469,000    
Employee agreements, special termination benefits, number of employees | employee                                 7      
Employee agreements, termination benefits provided to key employees, aggregate amount                                 $ 1,300,000      
WPD Pharmaceuticals | First Two Years                                        
Commitments and Contingencies                                        
Research and development commitment     $ 2,000,000.0                                  
WPD Pharmaceuticals | After Two Years                                        
Commitments and Contingencies                                        
Research and development commitment     1,000,000.0                                  
MD Anderson                                        
Commitments and Contingencies                                        
Payments for research and development agreement                           $ 110,000            
MD Anderson | License                                        
Commitments and Contingencies                                        
Cost of services                     100,000       100,000   100,000 200,000    
Houston Pharmaceuticals, Inc.                                        
Commitments and Contingencies                                        
Option repurchase payment   $ 1,000,000.0                                    
Houston Pharmaceuticals, Inc. | License                                        
Commitments and Contingencies                                        
Cost of services                     0.0       1,100,000   100,000 1,200,000    
MD Anderson                                        
Commitments and Contingencies                                        
Payments for research and development agreement       $ 400,000   $ 350,000 $ 300,000       200,000 $ 130,000 $ 270,000     $ 240,000        
Research and development                     100,000       $ 100,000   200,000 $ 200,000    
MD Anderson | Plan                                        
Commitments and Contingencies                                        
Payments for research and development agreement $ 400,000                                      
MD Anderson | Forecast                                        
Commitments and Contingencies                                        
Payments for research and development agreement                 $ 100,000 $ 100,000                    
Dermin                                        
Commitments and Contingencies                                        
Future payment to remove Germany                                     $ 500,000  
Dermin | Subsequent Event                                        
Commitments and Contingencies                                        
Equity distribution commitment                                       $ 500,000
WPD Pharmaceuticals                                        
Commitments and Contingencies                                        
Future payment to remove Germany     $ 500,000                                  
Lease Agreement For Corporate Office Space | IPX Memorial Drive Investors, LLC                                        
Commitments and Contingencies                                        
Leased office space (in square feet) | ft²         2,333                              
Term of operating lease (in months)         66 months                              
Operating lease, renewal term (in years)         5 years                              
Operating lease, monthly rent expense         $ 4,300                              
Operating lease, rent expense, annual increase in rent (as a percent)         3.00%                              
Maximum                                        
Commitments and Contingencies                                        
Payments for royalties                                 600,000      
Maximum | MD Anderson                                        
Commitments and Contingencies                                        
License agreement, annual license fee                                 100,000      
Milestone payments liabilities                     500,000           500,000      
Maximum | MD Anderson | Submission Of NDA And Receipt Of First Marketing Approval For Sale Of A Licensed Product                                        
Commitments and Contingencies                                        
Milestone payments liabilities                     $ 600,000           $ 600,000