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Future Minimum Rental and Lease Payments (Detail) (USD $) | Dec. 31, 2014
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Capital Leases |
Operating and Capital Leases [Line Items] |
Capital Leases 2015 | $ 248,000 us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent / med_ComponentOfOtherOperatingCostAndExpenseAxis = med_CapitalLeaseExpensesMember
Capital Leases 2016 | 248,000 us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears / med_ComponentOfOtherOperatingCostAndExpenseAxis = med_CapitalLeaseExpensesMember
Capital Leases 2017 | 0 us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears / med_ComponentOfOtherOperatingCostAndExpenseAxis = med_CapitalLeaseExpensesMember
Capital Leases 2018 | 0 us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears / med_ComponentOfOtherOperatingCostAndExpenseAxis = med_CapitalLeaseExpensesMember
Capital Leases 2019 | 0 us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears / med_ComponentOfOtherOperatingCostAndExpenseAxis = med_CapitalLeaseExpensesMember
Capital Leases, Total minimum lease payments | 496,000 us-gaap_CapitalLeasesFutureMinimumPaymentsDue / med_ComponentOfOtherOperatingCostAndExpenseAxis = med_CapitalLeaseExpensesMember
Less amount representing interest | 22,000 us-gaap_InterestPortionOfMinimumLeasePaymentsSaleLeasebackTransactions / med_ComponentOfOtherOperatingCostAndExpenseAxis = med_CapitalLeaseExpensesMember
Present value of minimum lease payments | 474,000 us-gaap_PresentValueOfFutureMinimumLeasePaymentsSaleLeasebackTransactions / med_ComponentOfOtherOperatingCostAndExpenseAxis = med_CapitalLeaseExpensesMember
Current portion | 232,000 us-gaap_DebtCurrent / med_ComponentOfOtherOperatingCostAndExpenseAxis = med_CapitalLeaseExpensesMember
Long-term portion | 242,000 us-gaap_LongTermDebtAndCapitalLeaseObligations / med_ComponentOfOtherOperatingCostAndExpenseAxis = med_CapitalLeaseExpensesMember
Operating Leases |
Operating and Capital Leases [Line Items] |
Operating Leases 2015 | 4,471,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent / med_ComponentOfOtherOperatingCostAndExpenseAxis = med_OperatingLeaseExpensesMember
Operating Leases 2016 | 3,633,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears / med_ComponentOfOtherOperatingCostAndExpenseAxis = med_OperatingLeaseExpensesMember
Operating Leases 2017 | 1,967,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears / med_ComponentOfOtherOperatingCostAndExpenseAxis = med_OperatingLeaseExpensesMember
Operating Leases 2018 | 488,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears / med_ComponentOfOtherOperatingCostAndExpenseAxis = med_OperatingLeaseExpensesMember
Operating Leases 2019 | 71,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears / med_ComponentOfOtherOperatingCostAndExpenseAxis = med_OperatingLeaseExpensesMember
Operating Leases, Total minimum lease payments | $ 10,630,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDue / med_ComponentOfOtherOperatingCostAndExpenseAxis = med_OperatingLeaseExpensesMember

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- Definition Amount of minimum lease payments for capital leases. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737 + Details
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- Definition Amount of minimum lease payments for capital leases due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737 + Details
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- Definition Amount of minimum lease payments for capital leases due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737 + Details
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- Definition Amount of minimum lease payments for capital leases due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737 + Details
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- Definition Amount of minimum lease payments for capital leases due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737 + Details
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- Definition Amount of minimum lease payments for capital leases due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737 + Details
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- Definition Amount of short-term debt and current maturity of long-term debt and capital lease obligations due within one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19 -Article 5 + Details
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- Definition Amount necessary to reduce minimum lease payments to present value for sale-leaseback transactions accounted for using the deposit method or as a financing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737 + Details
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- Definition Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 + Details
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- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 + Details
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- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 + Details
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- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 + Details
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- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 + Details
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