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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Accounts receivable, allowance for sales returns and doubtful accounts	$ 397,000med_AllowanceForDoubtfulAccountsReceivableAndSalesReturnsCurrent	$ 354,000med_AllowanceForDoubtfulAccountsReceivableAndSalesReturnsCurrent
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	12,391,652us-gaap_CommonStockSharesIssued	12,365,690us-gaap_CommonStockSharesIssued
Common stock, outstanding	12,124,699us-gaap_CommonStockSharesOutstanding	12,075,764us-gaap_CommonStockSharesOutstanding

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Allowance For Doubtful Accounts Receivable And Sales Returns Current

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Face amount or stated value per share of common stock.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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