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Nature of Business and Basis of Presentation (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	9 Months Ended
	Oct. 31, 2015	Sep. 30, 2016	Dec. 31, 2015
Equity transactions
Par value (in USD per share)		$ 0.001	$ 0.001
Cash , cash equivalents and marketable securities		$ 66.7
Minimum
Equity transactions
Period over which cash resources will be sufficient to maintain the company's current and planned operations		12 months
Initial Public Offering | Common Stock
Equity transactions
Shares issued (in shares)	6,250,000
Par value (in USD per share)	$ 0.001
Share price (in USD per share)	$ 7.00
Proceeds from issuance of common stock in initial public offering	$ 43.7
Private Placement | Common Stock
Equity transactions
Shares issued (in shares)	2,395,010
Proceeds from issuance of common stock in private placement	$ 16.7
Shares Purchased by Underwriters of the IPO | Common Stock
Equity transactions
Shares issued (in shares)	704,962

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