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Stockholders' Equity - 2011 Equity Incentive Plan (Details)
Dec. 31, 2020
shares
Stockholders' Equity  
Shares of common stock reserved for issuance (in shares) 9,308,788
Stock Compensation Plan | 2011 Equity Incentive Plan  
Stockholders' Equity  
Number of common stock eligible for issuance 13,000,000
Shares of common stock available for issuance (in shares) 1,549,598