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Summary of Significant Accounting Policies - Additional Information (Details) - USD ($) |  |  |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2020 | Aug. 14, 2020 | Jun. 24, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2019
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Offering expenses |  |  | $ 4,200,000 |  |  |  |  |
Conversion from convertible warrants |  |  | 188,643 |  |  |  |  |
Payments of Stock Issuance Costs |  |  |  |  |  | $ 93,000 | $ 3,950,000 |
Allowance for doubtful accounts | $ 100,000 |  |  | $ 100,000 |  | $ 100,000 |  | $ 100,000
Bad debt expense |  |  |  | $ 0 | $ 100,000 |  | $ 100,000 |
Dividend yield |  |  |  | 0.00% | 0.00% | 0.00% | 0.00% |
Dividends |  |  |  |  |  | $ 0 |  |
Minimum | ASU 2014-09 |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Standard payment terms |  |  |  |  |  | 90 days |  |
Maximum | ASU 2014-09 |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Period between payment by customer and transfer of promised services |  |  |  |  |  | 1 year |  |
Recognition period of incremental costs |  |  |  |  |  | 1 year |  |
IPO |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Number of shares issued |  |  | 9,109,725 |  |  |  |  |
Shares issued price per share |  |  | $ 17.00 |  |  |  |  |
Proceeds from issuance of common stock after deducting underwriting discounts, commissions and offering expenses upon completion of initial public offering |  |  | $ 139,800,000 |  |  |  |  |
Conversion from convertible preferred stock |  |  | 18,474,703 |  |  |  |  |
IPO | Convertible Preferred Stock |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Conversion from convertible warrants to purchase common stock |  |  | 84,585 |  |  |  |  |
Follow - On Offering |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Number of shares issued |  | 6,578,947 |  |  |  |  |  |
Shares issued price per share |  | $ 19.00 |  |  |  |  |  |
Proceeds from Issuance or Sale of Equity |  | $ 117,500,000 |  |  |  |  |  |
Offering expenses incurred |  | $ 400,000 |  |  |  |  |  |
Payments of Stock Issuance Costs | $ 100,000 |  |  |  |  |  |  |

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