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Summary of Accrued (Detail) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013
Summary of Expenses [Line Items] |  |
Accrued Balance | $ 1,361,000 us-gaap_AccruedLiabilitiesCurrentAndNoncurrent | $ 0 us-gaap_AccruedLiabilitiesCurrentAndNoncurrent
Charges incurred during the period | 6,006,000 med_ChargesForExpensesIncurred | 1,361,000 med_ChargesForExpensesIncurred
Payments during the period | (833,000)med_PaymentsForExpensesIncurred | 0 med_PaymentsForExpensesIncurred
Accrued Balance | $ 6,534,000 us-gaap_AccruedLiabilitiesCurrentAndNoncurrent | $ 1,361,000 us-gaap_AccruedLiabilitiesCurrentAndNoncurrent

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- Definition Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15(5)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.15(a)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Subparagraph a -Article 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Subparagraph 5 -Article 9 + Details
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