Quarterly report pursuant to Section 13 or 15(d)

Debt - Convertible Notes (Details)

v3.19.2
Debt - Convertible Notes (Details) - USD ($)
 3 Months Ended 12 Months Ended
Sep. 28, 2016
Jun. 30, 2019
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2016
Debt Instrument [Line Items]          
Repayments of debt $ 11,000,000        
Loss on extinguishment of debt     $ 431,000    
Warrant liability          
Debt Instrument [Line Items]          
Warrant liability   $ 12,525,000 $ 8,013,000    
Convertible notes          
Debt Instrument [Line Items]          
Debt face amount $ 16,000,000        
Interest rate 8.75%        
Gross amount $ 11,084,000        
Original discount 4,916,000        
Issuance costs $ 1,700,000       $ 212,000
Purchase price of principal (as a percent) 92.75%        
Warrants issued (in shares) 250,000 4,105,600      
Right to receive cash (as a percent)   2.50%      
Convertible debt conversion price (in dollars per share) $ 1.364   $ 1.364 $ 1.364  
Warrant to purchase (in shares)   256.60      
Warrant exercise price (in dollars per share) $ 1.364        
Proceeds from debt $ 14,316,000        
Notes converted     $ 5,700,000 $ 10,300,000  
Write off of debt discount       2,591,000  
Write off of deferred debt issuance cost     1,360,000 1,019,000  
Extinguishment of debt     $ 4,340,000 $ 6,690,000  
Conversion of stock, shares issued (in shares)     4,446,265 8,624,445  
Repayments of debt       $ 247,000  
Adjustments to additional paid in capital     $ 10,582,000 14,238,000  
Loss on extinguishment of debt       $ 1,785,000  
Convertible notes | Convertible note embedded derivative liability          
Debt Instrument [Line Items]          
Warrant liability 3,693,000        
Convertible notes | Warrant liability          
Debt Instrument [Line Items]          
Warrant liability $ 1,223,000