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
Jun. 05, 2018
Aug. 29, 2019
Dec. 31, 2019
2000 Plan      
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]      
Number of shares of common stock reserved for issuance     184,900
2017 Plan      
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]      
Number of shares of common stock reserved for issuance   900,000 300,000
Number of shares of common stock increased under amended and restated plan 300,000 300,000  
Number of shares available for future grant     510,993