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INCENTIVE STOCK PLAN (Details) (USD $)
12 Months Ended
Sep. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Outstanding, beginning of year 248,319us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Shares Granted   
Shares Exercised   
Shares Forfeited/expired (15,000)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod
Shares Outstanding, end of year 233,319us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Shares Vested/exercisable at end of year 228,013us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
Outstanding, beginning of year Weighted Average Exercise Price $ 40us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
Granted Weighted Average Exercise Price   
Exercised Weighted Average Exercise Price   
Forfeited/expired Weighted Average Exercise Price $ 26.57us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice
Outstanding, end of year Weighted Average Exercise Price $ 40.26us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
Vested/exercisable at end of year Weighted Average Exercise Price $ 40.53us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
Outstanding, beginning of year Fair Value On Grant Date $ 8,412,783drop_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingFairValue
Granted Fair Value On Grant Date   
Exercised Fair Value On Grant Date   
Forfeited/expired Fair Value On Grant Date 397,800drop_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsForfeitedInPeriodGrantDateFairValue
Outstanding, end of year Fair Value On Grant Date 8,014,983drop_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingFairValue
Vested, end of year Fair Value On Grant Date   
Outstanding, beginning of year Intrinsic Value 162,470us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
Granted Intrinsic Value   
Exercised Intrinsic Value   
Forfeited/expired Intrinsic Value   
Outstanding, end of year Intrinsic Value   
Vested/exercisable at end of year Intrinsic Value