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Nature of operations - Additional Information (Details) - Initial Public Offering $ / shares in Units, $ in Millions | Sep. 27, 2016 USD ($) $ / shares shares
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Nature of Operations [Line Items] |
Common stock issued including underwriter's overallotment option (in shares) | 9,583,333
Initial offering price (in USD per share) | $ / shares | $ 17.00
Gross proceeds from issuance of initial public offering | $ | $ 162.9
Net proceeds excluding underwriting discounts and commissions and other offering expenses including offering expenses paid prior to the initial public offering | $ | $ 54.9
Conversion of preferred stock into common stock (in shares) | 37,271,375
Existing Stockholders |
Nature of Operations [Line Items] |
Common stock issued including underwriter's overallotment option (in shares) | 5,583,333

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- Definition The number of new shares issued in the conversion of stock in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4313-108586 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586 + Details
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