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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Net loss per share attributable to common stockholders (Details 2) - USD ($) $ in Thousands	Sep. 30, 2015	Apr. 01, 2013
Stock repurchase program
Remaining approved amount for repurchases	$ 5,180
Maximum
Stock repurchase program
Amount of common stock approved by the entity for a stock repurchase program		$ 10,000