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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	$ 1,361,000us-gaap_AccruedLiabilitiesCurrentAndNoncurrent	$ 0us-gaap_AccruedLiabilitiesCurrentAndNoncurrent
Charges incurred during the period	6,006,000med_ChargesForExpensesIncurred	1,361,000med_ChargesForExpensesIncurred
Payments during the period	(833,000)med_PaymentsForExpensesIncurred	0med_PaymentsForExpensesIncurred
Accrued Balance	$ 6,534,000us-gaap_AccruedLiabilitiesCurrentAndNoncurrent	$ 1,361,000us-gaap_AccruedLiabilitiesCurrentAndNoncurrent

X

- Definition

Amount of charges incurred during the reporting period.

+ References

No definition available.

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- Definition

Payments for expenses incurred.

+ References

No definition available.

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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

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