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Warrants (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Warrants [Abstract]  
Number of shares callable by warrants (in shares) 81,224us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Warrants expiration date Dec. 31, 2015
Percentage of post exercise fully diluted capitalization (in hundredths) 5.00%acy_PercentageOfPostExerciseFullyDilutedCapitalizationOfTheEntity
Exercise price of warrants (in dollars per share) $ 8.75us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1