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CONSOLIDATED BALANCE SHEETS [Parenthetical] (USD $)
Mar. 31, 2015
Dec. 31, 2014
Allowance for doubtful accounts receivable (in dollars) $ 35,000us-gaap_AllowanceForDoubtfulAccountsReceivable $ 35,000us-gaap_AllowanceForDoubtfulAccountsReceivable
Deferred financing costs, accumulated amortization (in dollars) 2,887,984us-gaap_AccumulatedAmortizationDeferredFinanceCosts 2,690,005us-gaap_AccumulatedAmortizationDeferredFinanceCosts
Deferred leasing costs, accumulated amortization (in dollars) 573,311us-gaap_DeferredCostsLeasingAccumulatedAmortization 543,957us-gaap_DeferredCostsLeasingAccumulatedAmortization
Finite-lived intangible assets, accumulated amortization (in dollars) $ 6,671,752us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization $ 5,719,085us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Common stock, par value (in dollars per share) $ 0.0001us-gaap_CommonStockParOrStatedValuePerShare $ 0.0001us-gaap_CommonStockParOrStatedValuePerShare
Common stock, shares authorized 28,000,000us-gaap_CommonStockSharesAuthorized 28,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares, issued 17,602,615us-gaap_CommonStockSharesIssued 17,539,946us-gaap_CommonStockSharesIssued
Common stock, shares, outstanding 17,602,615us-gaap_CommonStockSharesOutstanding 17,539,946us-gaap_CommonStockSharesOutstanding
Excess stock, par value (in dollars per share) $ 0.0001adc_ExcessStockParOrStatedValuePerShare $ 0.0001adc_ExcessStockParOrStatedValuePerShare
Excess stock, shares authorized 8,000,000us-gaap_ExcessStockSharesAuthorized 8,000,000us-gaap_ExcessStockSharesAuthorized
Excess stock, shares issued 0us-gaap_ExcessStockSharesIssued 0us-gaap_ExcessStockSharesIssued
Excess stock, shares outstanding 0us-gaap_ExcessStockSharesOutstanding 0us-gaap_ExcessStockSharesOutstanding
Preferred stock, par value (in dollars per share) $ 0.0001us-gaap_PreferredStockParOrStatedValuePerShare $ 0.0001us-gaap_PreferredStockParOrStatedValuePerShare
Preferred stock, shares authorized 4,000,000us-gaap_PreferredStockSharesAuthorized 4,000,000us-gaap_PreferredStockSharesAuthorized
Series A Junior Participating Preferred Stock [Member]    
Preferred stock, par value (in dollars per share) $ 0.0001us-gaap_PreferredStockParOrStatedValuePerShare
/ us-gaap_StatementClassOfStockAxis
= adc_SeriesJuniorParticipatingPreferredStockMember		 $ 0.0001us-gaap_PreferredStockParOrStatedValuePerShare
/ us-gaap_StatementClassOfStockAxis
= adc_SeriesJuniorParticipatingPreferredStockMember
Preferred stock, shares authorized 200,000us-gaap_PreferredStockSharesAuthorized
/ us-gaap_StatementClassOfStockAxis
= adc_SeriesJuniorParticipatingPreferredStockMember		 200,000us-gaap_PreferredStockSharesAuthorized
/ us-gaap_StatementClassOfStockAxis
= adc_SeriesJuniorParticipatingPreferredStockMember
Preferred stock, shares issued 0us-gaap_PreferredStockSharesIssued
/ us-gaap_StatementClassOfStockAxis
= adc_SeriesJuniorParticipatingPreferredStockMember		 0us-gaap_PreferredStockSharesIssued
/ us-gaap_StatementClassOfStockAxis
= adc_SeriesJuniorParticipatingPreferredStockMember
Preferred stock, shares outstanding 0us-gaap_PreferredStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= adc_SeriesJuniorParticipatingPreferredStockMember		 0us-gaap_PreferredStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= adc_SeriesJuniorParticipatingPreferredStockMember