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CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)
Dec. 31, 2014
Dec. 31, 2013
Accounts receivable, allowance for sales returns and doubtful accounts $ 354,000med_AllowanceForDoubtfulAccountsReceivableAndSalesReturnsCurrent $ 564,000med_AllowanceForDoubtfulAccountsReceivableAndSalesReturnsCurrent
Preferred stock, par value $ 0.001us-gaap_PreferredStockParOrStatedValuePerShare $ 0.001us-gaap_PreferredStockParOrStatedValuePerShare
Preferred stock, authorized 1,500,000us-gaap_PreferredStockSharesAuthorized 1,500,000us-gaap_PreferredStockSharesAuthorized
Preferred stock, shares issued 0us-gaap_PreferredStockSharesIssued 0us-gaap_PreferredStockSharesIssued
Preferred stock, shares outstanding 0us-gaap_PreferredStockSharesOutstanding 0us-gaap_PreferredStockSharesOutstanding
Common stock, par value $ 0.001us-gaap_CommonStockParOrStatedValuePerShare $ 0.001us-gaap_CommonStockParOrStatedValuePerShare
Common stock, shares authorized 20,000,000us-gaap_CommonStockSharesAuthorized 20,000,000us-gaap_CommonStockSharesAuthorized
Common stock, issued 12,365,690us-gaap_CommonStockSharesIssued 13,143,309us-gaap_CommonStockSharesIssued
Common stock, outstanding 12,075,764us-gaap_CommonStockSharesOutstanding 13,115,642us-gaap_CommonStockSharesOutstanding