Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - 2000 Equity Incentive Plan and 2017 Equity Incentive Plan (Details)

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Stock-Based Compensation - 2000 Equity Incentive Plan and 2017 Equity Incentive Plan (Details) - shares
1 Months Ended
Aug. 27, 2020
Jun. 05, 2018
Aug. 29, 2019
Dec. 31, 2020
2000 Plan        
Stock-Based Compensation        
Number of shares of common stock reserved for issuance (in shares)       184,900
2017 Plan        
Stock-Based Compensation        
Number of shares of common stock reserved for issuance (in shares) 1,400,000   900,000 300,000
Number of shares of common stock increased under amended and restated plan (in shares) 500,000 300,000 300,000  
Number of shares available for future grant (in shares)       687,432