Capitalization - Schedule of Mandatory Conversion of Convertible Promissory Notes into Preferred Stock (Parenthetical) (Detail) |
Aug. 08, 2017
USD ($)
$ / shares
shares
|
---|---|
Series A Preferred Stock [Member] | |
Debt Conversion [Line Items] | |
Shares issued, price per share | $ / shares | $ 7.66 |
Convertible Promissory Notes [Member] | Note Purchase Agreement [Member] | |
Debt Conversion [Line Items] | |
Target valuation amount | $ | $ 16,000,000 |
Number of outstanding shares used for calculation of conversion price | shares | 3,863,547 |
Convertible Promissory Notes [Member] | Note Purchase Agreement - Related Parties [Member] | |
Debt Conversion [Line Items] | |
Target valuation amount | $ | $ 16,000,000 |
Number of outstanding shares used for calculation of conversion price | shares | 3,863,547 |
Convertible Promissory Notes [Member] | Second Note Purchase Agreement - Related Parties [Member] | |
Debt Conversion [Line Items] | |
Conversion percentage | 80.00% |