Stockholders' Equity - Common Stock (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		12 Months Ended
Sep. 22, 2016	Dec. 31, 2016
Class of Stock [Line Items]
Payments of stock issuance costs		$ 1.0
Bridge Loan \| Rights Offering
Class of Stock [Line Items]
Shares subscribed but unissued	4
Issuance of common stock, net of offering costs	$ 49.9
Proceeds from issuance of common stock, net	$ 49.0
Common Stock \| Bridge Loan \| Rights Offering
Class of Stock [Line Items]
Price per share (in dollars per share)	$ 12.25
Payments of stock issuance costs	$ 0.9

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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.

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Amount of common stock allocated to investors to buy shares of a new issue of common stock before they are offered to the public. When stock is sold on a subscription basis, the issuer does not initially receive the total proceeds. In general, the issuer does not issue the shares to the investor until it receives the entire proceeds.

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- Definition

The cash outflow for cost incurred directly with the issuance of an equity security.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585

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Per share or per unit amount of equity securities issued.

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Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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