Statements of Changes in Redeemable Convertible Preferred Stock and Stockholders' Equity (Parenthetical) (Unaudited) $ in Thousands	9 Months Ended
Sep. 30, 2019 USD ($)
Initial Public Offering
Issuance costs	$ 3,037
Series B Preferred Stock
Issuance costs	$ 166

The total of the cash outflow during the period which has been paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt and the cost incurred directly for the issuance of equity securities.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585

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