Quarterly report pursuant to Section 13 or 15(d)

Note Payable, Net - Additional Information (Details)

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Note Payable, Net - Additional Information (Details) - USD ($)
1 Months Ended 3 Months Ended
Dec. 31, 2016
Mar. 31, 2020
Dec. 31, 2019
Debt Instrument [Line Items]      
Note payable, net   $ 2,170,000  
Success fee $ 250,000    
Current share price (in dollars per share) $ 120.00    
Debt covenant, unrestricted cash   3,565,000  
Cash   $ 8,516,000 $ 10,872,000
Effective interest rate percentage   9.55%  
Loan Agreement      
Debt Instrument [Line Items]      
Maximum borrowing capacity $ 7,000,000    
Debt term   36 months  
Note payable, net   $ 245,000  
Accretion of final payment fee of debt   $ 235,000  
LIBOR | Loan Agreement      
Debt Instrument [Line Items]      
Variable rate percentage 5.41%