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Stock-Based Compensation, Equity Compensation Plans (Details)
9 Months Ended 12 Months Ended
Sep. 30, 2020
Plan
shares
Dec. 31, 2014
shares
Mar. 31, 2019
shares
Jan. 02, 2019
shares
Dec. 31, 2018
shares
Jan. 02, 2018
shares
Jan. 02, 2017
shares
Jan. 02, 2016
shares
Dec. 31, 2013
shares
Dec. 31, 2010
shares
Stock Options [Abstract]                    
Number of equity compensation plans | Plan 4                  
The Plans [Member]                    
Stock Options [Abstract]                    
Term of plan 10 years                  
The Plans [Member] | Incentive Stock Options [Member]                    
Stock Options [Abstract]                    
Vesting period 4 years                  
The Plans [Member] | Incentive Stock Options [Member] | Maximum [Member]                    
Stock Options [Abstract]                    
Term of option 10 years                  
The Plans [Member] | Nonqualified Options [Member] | Minimum [Member]                    
Stock Options [Abstract]                    
Vesting period 1 year                  
The Plans [Member] | Nonqualified Options [Member] | Maximum [Member]                    
Stock Options [Abstract]                    
Vesting period 5 years                  
2010 Equity Incentive Plan [Member]                    
Stock Options [Abstract]                    
Number of shares authorized for issuance (in shares)   67,520             63,957 27,410
2014 Equity Incentive Plan [Member]                    
Stock Options [Abstract]                    
Number of shares authorized for issuance (in shares)   91,367 826,292 323,529   271,941 210,203 152,366    
Percentage of Common Stock outstanding used to determine annual increase in the plan limit   4.00%                
2018 Equity Incentive Plan [Member]                    
Stock Options [Abstract]                    
Number of shares authorized for issuance (in shares)         558,071          
Shares available for grant (in shares) 190,799                  
2019 Inducement Plan [Member]                    
Stock Options [Abstract]                    
Shares available for grant (in shares) 121,500                  
Common stock reserved for issuance (in shares) 200,000