Stockholder's Deficit - Summary of Stock Option Activity (Details)	9 Months Ended
Sep. 30, 2017 $ / shares shares
Equity [Abstract]
Number of Options Outstanding, Beginning Balance \| shares	173,750
Number of Options Outstanding, Granted \| shares	233,167
Number of Options Outstanding, Exercised \| shares	(9,260)
Number of Options Outstanding, Canceled \| shares	(20,760)
Number of Options Outstanding, Ending Balance \| shares	376,897
Number of Options Exercisable, Ending Balance \| shares	126,564
Weighted- Average Exercise Price Options Outstanding, Beginning Balance \| $ / shares	$ 9.24
Weighted- Average Exercise Price Options Outstanding, Granted \| $ / shares	4.35
Weighted- Average Exercise Price Options Outstanding, Exercised \| $ / shares	5.40
Weighted- Average Exercise Price Options Outstanding, Canceled \| $ / shares
Weighted- Average Exercise Price Options Outstanding, Ending Balance \| $ / shares	6.52
Weighted- Average Exercise Price Options Exercisable, Ending Balance \| $ / shares	$ 10.45

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iii)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

+ References

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- Definition

The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(3)
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- Definition

Gross number of share options (or share units) granted during the period.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Number of share options (or share units) exercised during the current period.

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