XML 22 R30.htm IDEA: XBRL DOCUMENT v2.4.1.9

Available-For-Sale Securities Adjusted cost (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
Cash and Cash Equivalents and Marketable Securities [Line Items]
Cost	$ 60,440,000us-gaap_AvailableForSaleSecurities	$ 51,833,000us-gaap_AvailableForSaleSecurities
Unrealized Gains	1,039,000us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	914,000us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
Unrealized Losses	(162,000)us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	(184,000)us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
Accrued Interest	61,000us-gaap_InterestReceivable	81,000us-gaap_InterestReceivable
Estimated Fair Value	61,378,000us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent	52,644,000us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent
Cash & Cash Equivalents	33,423,000us-gaap_CashAndCashEquivalentsAtCarryingValue	24,459,000us-gaap_CashAndCashEquivalentsAtCarryingValue	41,360,000us-gaap_CashAndCashEquivalentsAtCarryingValue	36,382,000us-gaap_CashAndCashEquivalentsAtCarryingValue
Investment Securities	27,955,000us-gaap_InvestmentOwnedAtFairValue	28,185,000us-gaap_InvestmentOwnedAtFairValue
Cash
Cash and Cash Equivalents and Marketable Securities [Line Items]
Cost	32,242,000us-gaap_AvailableForSaleSecurities / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CashMember	23,894,000us-gaap_AvailableForSaleSecurities / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CashMember
Unrealized Gains	0us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CashMember	0us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CashMember
Unrealized Losses	0us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CashMember	0us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CashMember
Accrued Interest	0us-gaap_InterestReceivable / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CashMember	0us-gaap_InterestReceivable / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CashMember
Estimated Fair Value	32,242,000us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CashMember	23,894,000us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CashMember
Cash & Cash Equivalents	32,242,000us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CashMember	23,894,000us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CashMember
Investment Securities	0us-gaap_InvestmentOwnedAtFairValue / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CashMember	0us-gaap_InvestmentOwnedAtFairValue / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CashMember
Fair Value, Inputs, Level 1
Cash and Cash Equivalents and Marketable Securities [Line Items]
Cost	19,870,000us-gaap_AvailableForSaleSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	19,265,000us-gaap_AvailableForSaleSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Unrealized Gains	901,000us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	807,000us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Unrealized Losses	(151,000)us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	(165,000)us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Accrued Interest	10,000us-gaap_InterestReceivable / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	15,000us-gaap_InterestReceivable / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Estimated Fair Value	20,630,000us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	19,922,000us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Cash & Cash Equivalents	1,181,000us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	565,000us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Investment Securities	19,449,000us-gaap_InvestmentOwnedAtFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	19,357,000us-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	1,181,000us-gaap_AvailableForSaleSecurities / us-gaap_CashAndCashEquivalentsAxis = us-gaap_MoneyMarketFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	565,000us-gaap_AvailableForSaleSecurities / us-gaap_CashAndCashEquivalentsAxis = us-gaap_MoneyMarketFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Unrealized Gains	0us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_CashAndCashEquivalentsAxis = us-gaap_MoneyMarketFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	0us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_CashAndCashEquivalentsAxis = us-gaap_MoneyMarketFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Unrealized Losses	0us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_CashAndCashEquivalentsAxis = us-gaap_MoneyMarketFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	0us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_CashAndCashEquivalentsAxis = us-gaap_MoneyMarketFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Accrued Interest	0us-gaap_InterestReceivable / us-gaap_CashAndCashEquivalentsAxis = us-gaap_MoneyMarketFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	0us-gaap_InterestReceivable / us-gaap_CashAndCashEquivalentsAxis = us-gaap_MoneyMarketFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Estimated Fair Value	1,181,000us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent / us-gaap_CashAndCashEquivalentsAxis = us-gaap_MoneyMarketFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	565,000us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent / us-gaap_CashAndCashEquivalentsAxis = us-gaap_MoneyMarketFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Cash & Cash Equivalents	1,181,000us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_CashAndCashEquivalentsAxis = us-gaap_MoneyMarketFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	565,000us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_CashAndCashEquivalentsAxis = us-gaap_MoneyMarketFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Investment Securities	0us-gaap_InvestmentOwnedAtFairValue / us-gaap_CashAndCashEquivalentsAxis = us-gaap_MoneyMarketFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	0us-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	10,508,000us-gaap_AvailableForSaleSecurities / us-gaap_CashAndCashEquivalentsAxis = med_MutualFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	10,733,000us-gaap_AvailableForSaleSecurities / us-gaap_CashAndCashEquivalentsAxis = med_MutualFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Unrealized Gains	124,000us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_CashAndCashEquivalentsAxis = med_MutualFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	63,000us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_CashAndCashEquivalentsAxis = med_MutualFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Unrealized Losses	(99,000)us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_CashAndCashEquivalentsAxis = med_MutualFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	(129,000)us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_CashAndCashEquivalentsAxis = med_MutualFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Accrued Interest	0us-gaap_InterestReceivable / us-gaap_CashAndCashEquivalentsAxis = med_MutualFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	0us-gaap_InterestReceivable / us-gaap_CashAndCashEquivalentsAxis = med_MutualFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Estimated Fair Value	10,533,000us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent / us-gaap_CashAndCashEquivalentsAxis = med_MutualFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	10,667,000us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent / us-gaap_CashAndCashEquivalentsAxis = med_MutualFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Cash & Cash Equivalents	0us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_CashAndCashEquivalentsAxis = med_MutualFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	0us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_CashAndCashEquivalentsAxis = med_MutualFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Investment Securities	10,533,000us-gaap_InvestmentOwnedAtFairValue / us-gaap_CashAndCashEquivalentsAxis = med_MutualFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	10,667,000us-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	3,785,000us-gaap_AvailableForSaleSecurities / us-gaap_CashAndCashEquivalentsAxis = med_CorporateEquitySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	3,408,000us-gaap_AvailableForSaleSecurities / us-gaap_CashAndCashEquivalentsAxis = med_CorporateEquitySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Unrealized Gains	709,000us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_CashAndCashEquivalentsAxis = med_CorporateEquitySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	695,000us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_CashAndCashEquivalentsAxis = med_CorporateEquitySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Unrealized Losses	(51,000)us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_CashAndCashEquivalentsAxis = med_CorporateEquitySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	(31,000)us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_CashAndCashEquivalentsAxis = med_CorporateEquitySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Accrued Interest	0us-gaap_InterestReceivable / us-gaap_CashAndCashEquivalentsAxis = med_CorporateEquitySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	0us-gaap_InterestReceivable / us-gaap_CashAndCashEquivalentsAxis = med_CorporateEquitySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Estimated Fair Value	4,443,000us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent / us-gaap_CashAndCashEquivalentsAxis = med_CorporateEquitySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	4,072,000us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent / us-gaap_CashAndCashEquivalentsAxis = med_CorporateEquitySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Cash & Cash Equivalents	0us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_CashAndCashEquivalentsAxis = med_CorporateEquitySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	0us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_CashAndCashEquivalentsAxis = med_CorporateEquitySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Investment Securities	4,443,000us-gaap_InvestmentOwnedAtFairValue / us-gaap_CashAndCashEquivalentsAxis = med_CorporateEquitySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	4,072,000us-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	4,396,000us-gaap_AvailableForSaleSecurities / us-gaap_CashAndCashEquivalentsAxis = med_GovernmentAgencySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	4,559,000us-gaap_AvailableForSaleSecurities / us-gaap_CashAndCashEquivalentsAxis = med_GovernmentAgencySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Unrealized Gains	68,000us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_CashAndCashEquivalentsAxis = med_GovernmentAgencySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	49,000us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_CashAndCashEquivalentsAxis = med_GovernmentAgencySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Unrealized Losses	(1,000)us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_CashAndCashEquivalentsAxis = med_GovernmentAgencySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	(5,000)us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_CashAndCashEquivalentsAxis = med_GovernmentAgencySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Accrued Interest	10,000us-gaap_InterestReceivable / us-gaap_CashAndCashEquivalentsAxis = med_GovernmentAgencySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	15,000us-gaap_InterestReceivable / us-gaap_CashAndCashEquivalentsAxis = med_GovernmentAgencySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Estimated Fair Value	4,473,000us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent / us-gaap_CashAndCashEquivalentsAxis = med_GovernmentAgencySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	4,618,000us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent / us-gaap_CashAndCashEquivalentsAxis = med_GovernmentAgencySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Cash & Cash Equivalents	0us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_CashAndCashEquivalentsAxis = med_GovernmentAgencySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	0us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_CashAndCashEquivalentsAxis = med_GovernmentAgencySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Investment Securities	4,473,000us-gaap_InvestmentOwnedAtFairValue / us-gaap_CashAndCashEquivalentsAxis = med_GovernmentAgencySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	4,618,000us-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	8,328,000us-gaap_AvailableForSaleSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member	8,674,000us-gaap_AvailableForSaleSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member
Unrealized Gains	138,000us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member	107,000us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member
Unrealized Losses	(11,000)us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member	(19,000)us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member
Accrued Interest	51,000us-gaap_InterestReceivable / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member	66,000us-gaap_InterestReceivable / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member
Estimated Fair Value	8,506,000us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member	8,828,000us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member
Cash & Cash Equivalents	0us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member	0us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member
Investment Securities	8,506,000us-gaap_InvestmentOwnedAtFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member	8,828,000us-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	3,448,000us-gaap_AvailableForSaleSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_MunicipalBondsMember	3,652,000us-gaap_AvailableForSaleSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_MunicipalBondsMember
Unrealized Gains	73,000us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_MunicipalBondsMember	78,000us-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	(7,000)us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_MunicipalBondsMember
Accrued Interest	21,000us-gaap_InterestReceivable / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_MunicipalBondsMember	28,000us-gaap_InterestReceivable / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_MunicipalBondsMember
Estimated Fair Value	3,535,000us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_MunicipalBondsMember	3,751,000us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_MunicipalBondsMember
Cash & Cash Equivalents	0us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_MunicipalBondsMember	0us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_MunicipalBondsMember
Investment Securities	3,535,000us-gaap_InvestmentOwnedAtFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_MunicipalBondsMember	3,751,000us-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	4,880,000us-gaap_AvailableForSaleSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_CorporateBondSecuritiesMember	5,022,000us-gaap_AvailableForSaleSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_CorporateBondSecuritiesMember
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Unrealized Losses	(4,000)us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_CorporateBondSecuritiesMember	(12,000)us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_CorporateBondSecuritiesMember
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Investment Securities	$ 4,971,000us-gaap_InvestmentOwnedAtFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_CorporateBondSecuritiesMember	$ 5,077,000us-gaap_InvestmentOwnedAtFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_CorporateBondSecuritiesMember

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