The price per share of the conversion feature embedded in the debt instrument.

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Face (par) amount of debt instrument at time of issuance.

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Contractual interest rate for funds borrowed, under the debt agreement.

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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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Number of shares issued during the period as a result of the conversion of convertible securities.

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Convertible Note Financing (Details) - Convertible notes - Convertible Promissory Notes, April 2014 - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
	May. 29, 2014	Dec. 31, 2014	Apr. 28, 2014
Convertible note financing
Aggregate amount of loan borrowed			$ 3.0
Interest rate (as a percent)			8.00%
Conversion price (in dollars per share)	$ 6.00
Common stock
Convertible note financing
Conversion to common stock (in shares)	503,450	503,450