Equity - Class B Common Stock (Detail) - Class B Common Stock - shares |
1 Months Ended | 9 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Sep. 30, 2018 |
Aug. 31, 2018 |
Jun. 30, 2018 |
May 31, 2018 |
Apr. 30, 2018 |
Mar. 31, 2018 |
Jan. 31, 2018 |
Sep. 30, 2018 |
Sep. 30, 2017 |
Dec. 31, 2017 |
Dec. 31, 2016 |
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| Class Of Stock [Line Items] | |||||||||||
| Common stock conversion date | 2018-09 | 2018-08 | 2018-05 | 2018-04 | 2018-03 | 2018-01 | |||||
| Stock issued upon vesting of restricted stock units, Transaction date | 2018-08 | 2018-05 | |||||||||
| Common stock issuance date | 2018-06 | ||||||||||
| Common stock, shares outstanding | 5,106,564 | 5,106,564 | 5,070,000 | 5,059,319 | 4,866,000 | ||||||
| Cancellation of Class B common stock upon conversion of Class B units to Class A common stock | (17,666) | (22,285) | (24,732) | (20,000) | 202,000 | 52,000 | |||||
| Issuance of Class B common stock | 241,627 | 6,289 | 948 | 6,000 | 13,000 | ||||||
| Resale And Registration Rights Agreement | |||||||||||
| Class Of Stock [Line Items] | |||||||||||
| Cancellation of Class B common stock upon conversion of Class B units to Class A common stock | (17,666) | (22,285) | (24,732) | (20,000) | (85,286) | (31,650) | |||||
| X | ||||||||||
- Definition Common stock conversion month and year. No definition available.
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- Definition Common stock issuance period month and year. No definition available.
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- Definition Sale of restricted stock transaction date. No definition available.
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Number of shares issued during the period as a result of the conversion of convertible securities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Number of new stock issued during the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Details
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- Details
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