Related-Party Transactions - Additional Information (Details)
$ in Thousands |
1 Months Ended |
3 Months Ended |
|
|
Apr. 30, 2018
USD ($)
|
Jan. 31, 2018
USD ($)
shares
|
Oct. 31, 2017
USD ($)
Promissory
shares
|
Jul. 31, 2016
USD ($)
shares
|
Apr. 30, 2016
USD ($)
shares
|
Dec. 31, 2015
USD ($)
shares
|
Mar. 31, 2018
USD ($)
PromissoryNote
Executive
|
Mar. 31, 2017
USD ($)
|
Apr. 04, 2018
USD ($)
|
| Related Party Transaction [Line Items] |
|
|
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|
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|
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| Number of promissory notes | PromissoryNote |
|
|
|
|
|
|
3
|
|
|
| Number of executive officers | Executive |
|
|
|
|
|
|
2
|
|
|
| Proceeds from issuance of convertible preferred stock |
|
|
|
|
|
|
$ 54,951
|
$ 7,984
|
|
| Executive Officer |
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|
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|
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|
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| Related Party Transaction [Line Items] |
|
|
|
|
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|
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|
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| Due from related parties |
|
|
$ 2,100
|
|
|
|
|
|
|
| Restricted stock purchased by related party, shares | shares |
|
|
625,084
|
|
|
|
|
|
|
| Stockholders | Financing Activities |
|
|
|
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|
|
|
|
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| Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
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| Proceeds from issuance of convertible preferred stock |
|
|
|
|
|
|
$ 3,000
|
|
|
| Promissory Note | Executive Officer |
|
|
|
|
|
|
|
|
|
| Related Party Transaction [Line Items] |
|
|
|
|
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|
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| Number of promissory notes | Promissory |
|
|
2
|
|
|
|
|
|
|
| Due from related parties |
|
$ 400
|
|
$ 200
|
$ 200
|
$ 200
|
|
|
|
| Interest rate |
|
2.50%
|
|
2.50%
|
2.50%
|
2.50%
|
|
|
|
| Promissory Note | Common Stock | Executive Officer |
|
|
|
|
|
|
|
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| Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
|
| Early exercise options in aggregate | shares |
|
114,406
|
|
667,253
|
667,253
|
667,253
|
|
|
|
| Full-recourse Notes | Executive Officer | Subsequent Event |
|
|
|
|
|
|
|
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| Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
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| Due from related parties |
|
|
|
|
|
|
|
|
$ 200
|
| Promissory Note One | Executive Officer |
|
|
|
|
|
|
|
|
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| Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
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| Due from related parties |
|
|
$ 1,600
|
|
|
|
|
|
|
| Interest rate |
|
|
1.85%
|
|
|
|
|
|
|
| Promissory Note Two | Executive Officer |
|
|
|
|
|
|
|
|
|
| Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
|
|
| Due from related parties |
|
|
$ 500
|
|
|
|
|
|
|
| Interest rate |
|
|
1.85%
|
|
|
|
|
|
|
| Non-Recourse Promissory Note | Executive Officer | Subsequent Event |
|
|
|
|
|
|
|
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| Related Party Transaction [Line Items] |
|
|
|
|
|
|
|
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| Due from related parties |
|
|
|
|
|
|
|
|
$ 500
|
| Outstanding principal and accrued interest, forgiveness |
$ 1,600
|
|
|
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