Convertible Preferred Shares, Shareholders' Equity (Deficit) and Equity Incentive Plans - Additional Information (Detail) $ / shares in Units, $ in Thousands |
3 Months Ended | 9 Months Ended | 12 Months Ended | |||||||
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Aug. 31, 2020
USD ($)
shares
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Jul. 31, 2019
USD ($)
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Dec. 31, 2011 |
Sep. 30, 2020
USD ($)
$ / shares
shares
|
Sep. 30, 2019
USD ($)
$ / shares
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Sep. 30, 2020
USD ($)
$ / shares
shares
|
Sep. 30, 2019
USD ($)
$ / shares
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Dec. 31, 2019
USD ($)
shares
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Sep. 30, 2020
₪ / shares
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Dec. 31, 2019
₪ / shares
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|
Convertible preferred shares outstanding | 52,063,647 | |||||||||
Preferred stock par value | ₪ / shares | ₪ 0.01 | ₪ 0.01 | ||||||||
Preferred stock authorized | 50,000,000 | 50,000,000 | 0 | |||||||
Ordinary shares par value | ₪ / shares | ₪ 0.01 | ₪ 0.01 | ||||||||
Ordinary shares authorized | 500,000,000 | 500,000,000 | 101,314,353 | |||||||
Dividends declared | $ / shares | $ 0 | |||||||||
Ordinary shares available for future issuance | 10,131,821 | 10,131,821 | 1,119,471 | |||||||
Stock issued during period, shares, employee stock purchase plans | 2,100,000 | |||||||||
RSUs Vested | 138,400 | |||||||||
Share-based compensation expense | $ | $ 9,660 | $ 4,895 | $ 14,399 | $ 7,541 | ||||||
2020 Plan [Member] | ||||||||||
Ordinary shares to be reserved for grants of awards | 9,100,000 | 9,100,000 | ||||||||
Maximum number of shares to be added to the share based compensation arrangement plans | 15,309,367 | |||||||||
Share-based payment arrangement, plan modification, incremental shares authorized | 9,100,000 | 9,100,000 | ||||||||
Employee Share Purchase Plan [Member] | ||||||||||
Share options outstanding ordinary shares percentage | 5.00% | |||||||||
Accrued rate of rights to purchase ordinary shares under ESPPlans | $ | $ 25,000 | |||||||||
Percentage of eligible compensation | 15.00% | |||||||||
Maximum number of shares per employee | 1,250 | |||||||||
Purchase price of the shares on the offering period percentage | 85.00% | |||||||||
Number of shares purchased | 0 | 0 | ||||||||
Third Party Share Transaction [Member] | ||||||||||
Share-based compensation expense | $ | $ 3,300 | |||||||||
Employee Stock Option [Member] | ||||||||||
Weighted average grant date fair value of options granted | $ / shares | $ 19.26 | $ 7.24 | $ 15.46 | $ 6.16 | ||||||
Unrecognized share based compensation cost related to unvested share options | $ | $ 59,000 | $ 59,000 | $ 25,400 | |||||||
Unrecognized share based compensation cost expected to be recognised period | 3 years 4 months 24 days | 3 years 4 months 24 days | ||||||||
Employee Stock Option [Member] | 2011 Plan [Member] | ||||||||||
Share options vesting period | 5 years | |||||||||
Share options expiration period | 10 years | |||||||||
Ordinary shares to be reserved for grants of awards | 20,605,700 | 20,605,700 | ||||||||
Ordinary shares available for future issuance | 1,000,821 | 1,000,821 | ||||||||
Employee Stock Option [Member] | 2020 Plan [Member] | ||||||||||
Share options expiration period | 10 years | |||||||||
Share based compensation plan description | In September 2020, immediately prior to the IPO, the Company adopted the 2020 Plan. Following the effectiveness of the 2020 Plan, the Company will no longer grant any awards under the 2011 Plan, though previously granted options under the 2011 Plan remain outstanding and governed by the 2011 Plan. The 2020 Plan provides for the grant of share options, ordinary shares, restricted shares, restricted share units and other share-based awards. The maximum number of ordinary shares available for issuance under the 2020 Plan is equal to the sum of (i) 9,100,000 ordinary shares plus, (ii) any shares subject to the pool authorized by the Company’s board of directors under the 2011 Plan which remain free and unallocated as of the effective date, and (iii) any shares subject to awards granted under the 2011 Plan that, on or after the effective date, expire, or are cancelled, terminated, forfeited or settled in cash in lieu of issuance of shares, for any reason, without having been exercised, with the maximum number of shares to be added to the 2020 Plan pursuant to the 2011 Plan equal to 15,309,367 shares. | |||||||||
Share based compensation plan modifications description | In addition, the number of shares available for issuance under the Company’s 2020 Plan also includes an annual increase on January 1 of each year beginning on January 1, 2021 and ending on and including January 1, 2030, in an amount equal to the least of (i) 9,100,000 ordinary shares, (ii) five percent (5%) of the total number of ordinary shares outstanding as of the last day of the immediately preceding calendar year on a fully diluted basis, or (iii) such number of shares determined by the Company’s board of directors. | |||||||||
Share options grant date | Jan. 01, 2021 | |||||||||
Share options expiration period | Jan. 01, 2030 | |||||||||
Share options outstanding ordinary shares percentage | 5.00% | |||||||||
Employee Stock Option [Member] | Employee Share Purchase Plan [Member] | ||||||||||
Ordinary shares to be reserved for grants of awards | 2,100,000 | |||||||||
Share options outstanding ordinary shares percentage | 1.00% | |||||||||
Employee share purchase plan offering date | March 1 and September 1 | |||||||||
Employee Stock Option [Member] | Employee Share Purchase Plan [Member] | IPO [Member] | ||||||||||
Employee share purchase plan offering date | March 1, 2021 | |||||||||
Restricted Stock [Member] | ||||||||||
RSUs Vested | 138,400 | |||||||||
RSUs to be reserved for grants of awards | 667,595 | |||||||||
RSUs unvested | 529,195 | 529,195 | ||||||||
Restricted Stock [Member] | Employee Share Purchase Plan [Member] | ||||||||||
Share based compensation plan description | The number of ordinary shares available for sale under the ESPP also includes an annual increase on the first day of each fiscal year beginning with 2021, equal to the least of (i) 2,100,000 ordinary shares, (ii) one percent (1%) of the total number of ordinary shares outstanding as of the last day of the immediately preceding calendar year on a fully diluted basis, or (iii) such other amount as may be determined by the Company. | |||||||||
Other RSU [Member] | ||||||||||
RSUs to be reserved for grants of awards | 0 | |||||||||
Restricted Stock Units (RSUs) [Member] | ||||||||||
Unrecognized share based compensation cost related to unvested RSUs | $ | $ 19,700 | $ 19,700 | ||||||||
Unrecognized share based compensation cost expected to be recognised period | 1 year | |||||||||
Restricted Stock Units (RSUs) [Member] | Chief Executive Officer [Member] | ||||||||||
RSUs to be reserved for grants of awards | 667,595 | |||||||||
Restricted Stock Units (RSUs) [Member] | Share-based Payment Arrangement, Tranche One [Member] | Chief Executive Officer [Member] | ||||||||||
RSUs Vested | 138,400 | |||||||||
Restricted Stock Units (RSUs) [Member] | Share-based Payment Arrangement, Tranche Two [Member] | Chief Executive Officer [Member] | ||||||||||
RSUs unvested | 529,195 | |||||||||
Convertible Preferred Stock [Member] | ||||||||||
Convertible preferred shares outstanding | 52,063,647 | |||||||||
Ordinary shares carrying value | $ | $ 175,800 | |||||||||
Stock split | one-to-one |