XML 51 R36.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Available-For-Sale Securities Adjusted cost (Detail) (USD $) | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
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Cash and Cash Equivalents and Marketable Securities [Line Items] |  |  |  |
Cost | $ 51,833,000 us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis | $ 66,514,000 us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis |  |
Unrealized Gains | 914,000 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax | 1,442,000 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax |  |
Unrealized Losses | (184,000)us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax | (263,000)us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax |  |
Accrued Interest | 81,000 us-gaap_InterestReceivable | 109,000 us-gaap_InterestReceivable |  |
Estimated Fair Value | 52,644,000 us-gaap_AvailableForSaleSecurities | 67,802,000 us-gaap_AvailableForSaleSecurities |  |
Cash & Cash Equivalents | 24,459,000 us-gaap_CashAndCashEquivalentsAtCarryingValue | 36,382,000 us-gaap_CashAndCashEquivalentsAtCarryingValue | 39,937,000 us-gaap_CashAndCashEquivalentsAtCarryingValue | 14,262,000 us-gaap_CashAndCashEquivalentsAtCarryingValue
Investment Securities | 28,185,000 us-gaap_InvestmentOwnedAtFairValue | 31,420,000 us-gaap_InvestmentOwnedAtFairValue |  |
Cash |  |  |  |
Cash and Cash Equivalents and Marketable Securities [Line Items] |  |  |  |
Cost | 23,894,000 us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CashMember | 30,958,000 us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CashMember |  |
Unrealized Gains | 0 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CashMember | 0 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CashMember |  |
Unrealized Losses | 0 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CashMember | 0 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CashMember |  |
Accrued Interest | 0 us-gaap_InterestReceivable / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CashMember | 0 us-gaap_InterestReceivable / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CashMember |  |
Estimated Fair Value | 23,894,000 us-gaap_AvailableForSaleSecurities / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CashMember | 30,958,000 us-gaap_AvailableForSaleSecurities / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CashMember |  |
Cash & Cash Equivalents | 23,894,000 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CashMember | 30,958,000 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CashMember |  |
Investment Securities | 0 us-gaap_InvestmentOwnedAtFairValue / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CashMember | 0 us-gaap_InvestmentOwnedAtFairValue / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CashMember |  |
Fair Value, Inputs, Level 1 |  |  |  |
Cash and Cash Equivalents and Marketable Securities [Line Items] |  |  |  |
Cost | 19,265,000 us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | 24,037,000 us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |  |
Unrealized Gains | 807,000 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | 1,265,000 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |  |
Unrealized Losses | (165,000)us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | (216,000)us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |  |
Accrued Interest | 15,000 us-gaap_InterestReceivable / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | 26,000 us-gaap_InterestReceivable / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |  |
Estimated Fair Value | 19,922,000 us-gaap_AvailableForSaleSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | 25,112,000 us-gaap_AvailableForSaleSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |  |
Cash & Cash Equivalents | 565,000 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | 5,424,000 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |  |
Investment Securities | 19,357,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | 19,688,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |  |
Fair Value, Inputs, Level 1 | Money Market Accounts |  |  |  |
Cash and Cash Equivalents and Marketable Securities [Line Items] |  |  |  |
Cost | 565,000 us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis / us-gaap_CashAndCashEquivalentsAxis = us-gaap_MoneyMarketFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | 5,424,000 us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis / us-gaap_CashAndCashEquivalentsAxis = us-gaap_MoneyMarketFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |  |
Unrealized Gains | 0 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_CashAndCashEquivalentsAxis = us-gaap_MoneyMarketFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | 0 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_CashAndCashEquivalentsAxis = us-gaap_MoneyMarketFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |  |
Unrealized Losses | 0 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_CashAndCashEquivalentsAxis = us-gaap_MoneyMarketFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | 0 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_CashAndCashEquivalentsAxis = us-gaap_MoneyMarketFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |  |
Accrued Interest | 0 us-gaap_InterestReceivable / us-gaap_CashAndCashEquivalentsAxis = us-gaap_MoneyMarketFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | 0 us-gaap_InterestReceivable / us-gaap_CashAndCashEquivalentsAxis = us-gaap_MoneyMarketFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |  |
Estimated Fair Value | 565,000 us-gaap_AvailableForSaleSecurities / us-gaap_CashAndCashEquivalentsAxis = us-gaap_MoneyMarketFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | 5,424,000 us-gaap_AvailableForSaleSecurities / us-gaap_CashAndCashEquivalentsAxis = us-gaap_MoneyMarketFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |  |
Cash & Cash Equivalents | 565,000 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_CashAndCashEquivalentsAxis = us-gaap_MoneyMarketFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | 5,424,000 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_CashAndCashEquivalentsAxis = us-gaap_MoneyMarketFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |  |
Investment Securities | 0 us-gaap_InvestmentOwnedAtFairValue / us-gaap_CashAndCashEquivalentsAxis = us-gaap_MoneyMarketFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | 0 us-gaap_InvestmentOwnedAtFairValue / us-gaap_CashAndCashEquivalentsAxis = us-gaap_MoneyMarketFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |  |
Fair Value, Inputs, Level 1 | Mutual Funds |  |  |  |
Cash and Cash Equivalents and Marketable Securities [Line Items] |  |  |  |
Cost | 10,733,000 us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis / us-gaap_CashAndCashEquivalentsAxis = med_MutualFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | 7,887,000 us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis / us-gaap_CashAndCashEquivalentsAxis = med_MutualFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |  |
Unrealized Gains | 63,000 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_CashAndCashEquivalentsAxis = med_MutualFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | 127,000 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_CashAndCashEquivalentsAxis = med_MutualFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |  |
Unrealized Losses | (129,000)us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_CashAndCashEquivalentsAxis = med_MutualFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | (164,000)us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_CashAndCashEquivalentsAxis = med_MutualFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |  |
Accrued Interest | 0 us-gaap_InterestReceivable / us-gaap_CashAndCashEquivalentsAxis = med_MutualFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | 0 us-gaap_InterestReceivable / us-gaap_CashAndCashEquivalentsAxis = med_MutualFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |  |
Estimated Fair Value | 10,667,000 us-gaap_AvailableForSaleSecurities / us-gaap_CashAndCashEquivalentsAxis = med_MutualFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | 7,850,000 us-gaap_AvailableForSaleSecurities / us-gaap_CashAndCashEquivalentsAxis = med_MutualFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |  |
Cash & Cash Equivalents | 0 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_CashAndCashEquivalentsAxis = med_MutualFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | 0 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_CashAndCashEquivalentsAxis = med_MutualFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |  |
Investment Securities | 10,667,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_CashAndCashEquivalentsAxis = med_MutualFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | 7,850,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_CashAndCashEquivalentsAxis = med_MutualFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |  |
Fair Value, Inputs, Level 1 | Corporate Equity Securities |  |  |  |
Cash and Cash Equivalents and Marketable Securities [Line Items] |  |  |  |
Cost | 3,408,000 us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis / us-gaap_CashAndCashEquivalentsAxis = med_CorporateEquitySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | 4,614,000 us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis / us-gaap_CashAndCashEquivalentsAxis = med_CorporateEquitySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |  |
Unrealized Gains | 695,000 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_CashAndCashEquivalentsAxis = med_CorporateEquitySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | 1,076,000 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_CashAndCashEquivalentsAxis = med_CorporateEquitySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |  |
Unrealized Losses | (31,000)us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_CashAndCashEquivalentsAxis = med_CorporateEquitySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | (9,000)us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_CashAndCashEquivalentsAxis = med_CorporateEquitySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |  |
Accrued Interest | 0 us-gaap_InterestReceivable / us-gaap_CashAndCashEquivalentsAxis = med_CorporateEquitySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | 0 us-gaap_InterestReceivable / us-gaap_CashAndCashEquivalentsAxis = med_CorporateEquitySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |  |
Estimated Fair Value | 4,072,000 us-gaap_AvailableForSaleSecurities / us-gaap_CashAndCashEquivalentsAxis = med_CorporateEquitySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | 5,681,000 us-gaap_AvailableForSaleSecurities / us-gaap_CashAndCashEquivalentsAxis = med_CorporateEquitySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |  |
Cash & Cash Equivalents | 0 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_CashAndCashEquivalentsAxis = med_CorporateEquitySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | 0 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_CashAndCashEquivalentsAxis = med_CorporateEquitySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |  |
Investment Securities | 4,072,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_CashAndCashEquivalentsAxis = med_CorporateEquitySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | 5,681,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_CashAndCashEquivalentsAxis = med_CorporateEquitySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |  |
Fair Value, Inputs, Level 1 | Government Agency Securities |  |  |  |
Cash and Cash Equivalents and Marketable Securities [Line Items] |  |  |  |
Cost | 4,559,000 us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis / us-gaap_CashAndCashEquivalentsAxis = med_GovernmentAgencySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | 6,112,000 us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis / us-gaap_CashAndCashEquivalentsAxis = med_GovernmentAgencySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |  |
Unrealized Gains | 49,000 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_CashAndCashEquivalentsAxis = med_GovernmentAgencySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | 62,000 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_CashAndCashEquivalentsAxis = med_GovernmentAgencySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |  |
Unrealized Losses | (5,000)us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_CashAndCashEquivalentsAxis = med_GovernmentAgencySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | (43,000)us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_CashAndCashEquivalentsAxis = med_GovernmentAgencySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |  |
Accrued Interest | 15,000 us-gaap_InterestReceivable / us-gaap_CashAndCashEquivalentsAxis = med_GovernmentAgencySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | 26,000 us-gaap_InterestReceivable / us-gaap_CashAndCashEquivalentsAxis = med_GovernmentAgencySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |  |
Estimated Fair Value | 4,618,000 us-gaap_AvailableForSaleSecurities / us-gaap_CashAndCashEquivalentsAxis = med_GovernmentAgencySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | 6,157,000 us-gaap_AvailableForSaleSecurities / us-gaap_CashAndCashEquivalentsAxis = med_GovernmentAgencySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |  |
Cash & Cash Equivalents | 0 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_CashAndCashEquivalentsAxis = med_GovernmentAgencySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | 0 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_CashAndCashEquivalentsAxis = med_GovernmentAgencySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |  |
Investment Securities | 4,618,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_CashAndCashEquivalentsAxis = med_GovernmentAgencySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | 6,157,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_CashAndCashEquivalentsAxis = med_GovernmentAgencySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |  |
Fair Value, Inputs, Level 2 |  |  |  |
Cash and Cash Equivalents and Marketable Securities [Line Items] |  |  |  |
Cost | 8,674,000 us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member | 11,519,000 us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member |  |
Unrealized Gains | 107,000 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member | 177,000 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member |  |
Unrealized Losses | (19,000)us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member | (47,000)us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member |  |
Accrued Interest | 66,000 us-gaap_InterestReceivable / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member | 83,000 us-gaap_InterestReceivable / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member |  |
Estimated Fair Value | 8,828,000 us-gaap_AvailableForSaleSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member | 11,732,000 us-gaap_AvailableForSaleSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member |  |
Cash & Cash Equivalents | 0 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member | 0 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member |  |
Investment Securities | 8,828,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member | 11,732,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member |  |
Fair Value, Inputs, Level 2 | Municipal Bonds |  |  |  |
Cash and Cash Equivalents and Marketable Securities [Line Items] |  |  |  |
Cost | 3,652,000 us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_MunicipalBondsMember | 3,524,000 us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_MunicipalBondsMember |  |
Unrealized Gains | 78,000 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_MunicipalBondsMember | 103,000 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_MunicipalBondsMember |  |
Unrealized Losses | (7,000)us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_MunicipalBondsMember | 0 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_MunicipalBondsMember |  |
Accrued Interest | 28,000 us-gaap_InterestReceivable / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_MunicipalBondsMember | 25,000 us-gaap_InterestReceivable / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_MunicipalBondsMember |  |
Estimated Fair Value | 3,751,000 us-gaap_AvailableForSaleSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_MunicipalBondsMember | 3,652,000 us-gaap_AvailableForSaleSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_MunicipalBondsMember |  |
Cash & Cash Equivalents | 0 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_MunicipalBondsMember | 0 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_MunicipalBondsMember |  |
Investment Securities | 3,751,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_MunicipalBondsMember | 3,652,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_MunicipalBondsMember |  |
Fair Value, Inputs, Level 2 | Corporate Bonds |  |  |  |
Cash and Cash Equivalents and Marketable Securities [Line Items] |  |  |  |
Cost | 5,022,000 us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_CorporateBondSecuritiesMember | 7,995,000 us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_CorporateBondSecuritiesMember |  |
Unrealized Gains | 29,000 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_CorporateBondSecuritiesMember | 74,000 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_CorporateBondSecuritiesMember |  |
Unrealized Losses | (12,000)us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_CorporateBondSecuritiesMember | (47,000)us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_CorporateBondSecuritiesMember |  |
Accrued Interest | 38,000 us-gaap_InterestReceivable / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_CorporateBondSecuritiesMember | 58,000 us-gaap_InterestReceivable / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_CorporateBondSecuritiesMember |  |
Estimated Fair Value | 5,077,000 us-gaap_AvailableForSaleSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_CorporateBondSecuritiesMember | 8,080,000 us-gaap_AvailableForSaleSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_CorporateBondSecuritiesMember |  |
Cash & Cash Equivalents | 0 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_CorporateBondSecuritiesMember | 0 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_CorporateBondSecuritiesMember |  |
Investment Securities | $ 5,077,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_CorporateBondSecuritiesMember | $ 8,080,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_CorporateBondSecuritiesMember |  |

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