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Note 3 - Acquisitions (Details) (USD $)
12 Months Ended 78 Months Ended 84 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2014
Dec. 31, 2014
Aug. 31, 2012
Dec. 19, 2012
Jan. 16, 2014
Feb. 03, 2014
Feb. 14, 2014
Jun. 06, 2014
Note 3 - Acquisitions (Details) [Line Items]                      
Number of Businesses Acquired       50us-gaap_NumberOfBusinessesAcquired 50us-gaap_NumberOfBusinessesAcquired            
Business Combination, Acquisition Related Costs $ 3,535,000us-gaap_BusinessCombinationAcquisitionRelatedCosts $ 2,134,000us-gaap_BusinessCombinationAcquisitionRelatedCosts $ 1,655,000us-gaap_BusinessCombinationAcquisitionRelatedCosts                
Business Combination, Pro Forma Information, Adjustments to Interest and Other Expenses Related to Funding of Acquisition   (3,300,000)exam_BusinessCombinationProFormaInformationAdjustmentsToInterestAndOtherExpensesRelatedToFundingOfAcquisition                  
Business Combination, Pro Forma Information, Incremental Depreciation and Amoritzation 3,400,000exam_BusinessCombinationProFormaInformationIncrementalDepreciationAndAmoritzation 17,700,000exam_BusinessCombinationProFormaInformationIncrementalDepreciationAndAmoritzation                  
Business Combination, Pro Forma Information, Adjustments to Selling, General and Administrative Expense 5,600,000exam_BusinessCombinationProFormaInformationAdjustmentsToSellingGeneralAndAdministrativeExpense 7,300,000exam_BusinessCombinationProFormaInformationAdjustmentsToSellingGeneralAndAdministrativeExpense                  
Selling, General and Administrative Expenses [Member] | 2014 Acquisitions [Member]                      
Note 3 - Acquisitions (Details) [Line Items]                      
Business Combination, Acquisition Related Costs 1,000,000us-gaap_BusinessCombinationAcquisitionRelatedCosts
/ us-gaap_BusinessAcquisitionAxis
= exam_TheAcquisitions2014Member
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_SellingGeneralAndAdministrativeExpensesMember
569,000us-gaap_BusinessCombinationAcquisitionRelatedCosts
/ us-gaap_BusinessAcquisitionAxis
= exam_TheAcquisitions2014Member
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_SellingGeneralAndAdministrativeExpensesMember
                 
Scenario, Adjustment [Member] | 2012 Acquisitions [Member]                      
Note 3 - Acquisitions (Details) [Line Items]                      
Business Combination, Consideration Transferred 373,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= exam_The2012AcquisitionsMember
/ us-gaap_StatementScenarioAxis
= us-gaap_ScenarioAdjustmentMember
350,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= exam_The2012AcquisitionsMember
/ us-gaap_StatementScenarioAxis
= us-gaap_ScenarioAdjustmentMember
350,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= exam_The2012AcquisitionsMember
/ us-gaap_StatementScenarioAxis
= us-gaap_ScenarioAdjustmentMember
               
2012 Acquisitions [Member]                      
Note 3 - Acquisitions (Details) [Line Items]                      
Business Combination, Consideration Transferred   109,525,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= exam_The2012AcquisitionsMember
109,500,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= exam_The2012AcquisitionsMember
               
Payments to Acquire Businesses, Gross     112,300,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= exam_The2012AcquisitionsMember
               
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents     2,900,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
/ us-gaap_BusinessAcquisitionAxis
= exam_The2012AcquisitionsMember
               
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in Shares)     6,190us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued
/ us-gaap_BusinessAcquisitionAxis
= exam_The2012AcquisitionsMember
               
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned     85,000us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned
/ us-gaap_BusinessAcquisitionAxis
= exam_The2012AcquisitionsMember
               
Business Acquisition, Transaction Costs   28,000us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts
/ us-gaap_BusinessAcquisitionAxis
= exam_The2012AcquisitionsMember
1,300,000us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts
/ us-gaap_BusinessAcquisitionAxis
= exam_The2012AcquisitionsMember
               
Business Acquisition, Goodwill, Expected Tax Deductible Amount     59,100,000us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount
/ us-gaap_BusinessAcquisitionAxis
= exam_The2012AcquisitionsMember
               
Business Acquisition Purchase Price Allocation Intangible Assets Expected Tax Deductible Amount     50,200,000exam_BusinessAcquisitionPurchasePriceAllocationIntangibleAssetsExpectedTaxDeductibleAmount
/ us-gaap_BusinessAcquisitionAxis
= exam_The2012AcquisitionsMember
               
MedHealth Holdings Pty Limited [Member]                      
Note 3 - Acquisitions (Details) [Line Items]                      
Business Acquisition, Percentage of Voting Interests Acquired           100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
/ us-gaap_BusinessAcquisitionAxis
= exam_MedHealthHoldingsMember
         
Parthenia Medical Group [Member]                      
Note 3 - Acquisitions (Details) [Line Items]                      
Business Acquisition, Percentage of Voting Interests Acquired             100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
/ us-gaap_BusinessAcquisitionAxis
= exam_PartheniaMedicalGroupMember
       
Acquisitions 2013 [Member]                      
Note 3 - Acquisitions (Details) [Line Items]                      
Business Combination, Consideration Transferred   7,300,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= exam_Acquisitions2013Member
                 
Payments to Acquire Businesses, Gross   3,300,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= exam_Acquisitions2013Member
                 
Business Acquisition, Transaction Costs   83,000us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts
/ us-gaap_BusinessAcquisitionAxis
= exam_Acquisitions2013Member
                 
Business Acquisition, Goodwill, Expected Tax Deductible Amount 2,800,000us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount
/ us-gaap_BusinessAcquisitionAxis
= exam_Acquisitions2013Member
    2,800,000us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount
/ us-gaap_BusinessAcquisitionAxis
= exam_Acquisitions2013Member
2,800,000us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount
/ us-gaap_BusinessAcquisitionAxis
= exam_Acquisitions2013Member
           
Business Acquisition Purchase Price Allocation Intangible Assets Expected Tax Deductible Amount 3,900,000exam_BusinessAcquisitionPurchasePriceAllocationIntangibleAssetsExpectedTaxDeductibleAmount
/ us-gaap_BusinessAcquisitionAxis
= exam_Acquisitions2013Member
    3,900,000exam_BusinessAcquisitionPurchasePriceAllocationIntangibleAssetsExpectedTaxDeductibleAmount
/ us-gaap_BusinessAcquisitionAxis
= exam_Acquisitions2013Member
3,900,000exam_BusinessAcquisitionPurchasePriceAllocationIntangibleAssetsExpectedTaxDeductibleAmount
/ us-gaap_BusinessAcquisitionAxis
= exam_Acquisitions2013Member
           
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities   4,000,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities
/ us-gaap_BusinessAcquisitionAxis
= exam_Acquisitions2013Member
                 
Other 2011 Acquisitions [Member]                      
Note 3 - Acquisitions (Details) [Line Items]                      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents   8,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
/ us-gaap_BusinessAcquisitionAxis
= exam_Other2011AcquisitionsMember
                 
2014 Acquisitions [Member]                      
Note 3 - Acquisitions (Details) [Line Items]                      
Business Combination, Consideration Transferred 194,700,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= exam_TheAcquisitions2014Member
                   
Payments to Acquire Businesses, Gross 188,900,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= exam_TheAcquisitions2014Member
                   
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents 1,100,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
/ us-gaap_BusinessAcquisitionAxis
= exam_TheAcquisitions2014Member
    1,100,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
/ us-gaap_BusinessAcquisitionAxis
= exam_TheAcquisitions2014Member
1,100,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
/ us-gaap_BusinessAcquisitionAxis
= exam_TheAcquisitions2014Member
           
Business Acquisition, Transaction Costs 1,600,000us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts
/ us-gaap_BusinessAcquisitionAxis
= exam_TheAcquisitions2014Member
    1,600,000us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts
/ us-gaap_BusinessAcquisitionAxis
= exam_TheAcquisitions2014Member
1,600,000us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts
/ us-gaap_BusinessAcquisitionAxis
= exam_TheAcquisitions2014Member
           
Business Acquisition, Goodwill, Expected Tax Deductible Amount 116,500,000us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount
/ us-gaap_BusinessAcquisitionAxis
= exam_TheAcquisitions2014Member
    116,500,000us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount
/ us-gaap_BusinessAcquisitionAxis
= exam_TheAcquisitions2014Member
116,500,000us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount
/ us-gaap_BusinessAcquisitionAxis
= exam_TheAcquisitions2014Member
           
Business Acquisition Purchase Price Allocation Intangible Assets Expected Tax Deductible Amount 36,700,000exam_BusinessAcquisitionPurchasePriceAllocationIntangibleAssetsExpectedTaxDeductibleAmount
/ us-gaap_BusinessAcquisitionAxis
= exam_TheAcquisitions2014Member
    36,700,000exam_BusinessAcquisitionPurchasePriceAllocationIntangibleAssetsExpectedTaxDeductibleAmount
/ us-gaap_BusinessAcquisitionAxis
= exam_TheAcquisitions2014Member
36,700,000exam_BusinessAcquisitionPurchasePriceAllocationIntangibleAssetsExpectedTaxDeductibleAmount
/ us-gaap_BusinessAcquisitionAxis
= exam_TheAcquisitions2014Member
           
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities 6,900,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities
/ us-gaap_BusinessAcquisitionAxis
= exam_TheAcquisitions2014Member
    6,900,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities
/ us-gaap_BusinessAcquisitionAxis
= exam_TheAcquisitions2014Member
6,900,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities
/ us-gaap_BusinessAcquisitionAxis
= exam_TheAcquisitions2014Member
           
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual 63,900,000us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual
/ us-gaap_BusinessAcquisitionAxis
= exam_TheAcquisitions2014Member
                   
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual 2,000,000us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual
/ us-gaap_BusinessAcquisitionAxis
= exam_TheAcquisitions2014Member
                   
Cheselden [Member]                      
Note 3 - Acquisitions (Details) [Line Items]                      
Business Acquisition, Percentage of Voting Interests Acquired               100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
/ us-gaap_BusinessAcquisitionAxis
= exam_CheseldenMember
     
G&L Intermediate Holdings [Member]                      
Note 3 - Acquisitions (Details) [Line Items]                      
Business Acquisition, Percentage of Voting Interests Acquired                 100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
/ us-gaap_BusinessAcquisitionAxis
= exam_GLIntermediateHoldingsMember
   
Assess Medical Group [Member]                      
Note 3 - Acquisitions (Details) [Line Items]                      
Business Acquisition, Percentage of Voting Interests Acquired                   100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
/ us-gaap_BusinessAcquisitionAxis
= exam_AssessMedicalGroupMember
 
Ability Services Network [Member]                      
Note 3 - Acquisitions (Details) [Line Items]                      
Business Acquisition, Percentage of Voting Interests Acquired                     100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
/ us-gaap_BusinessAcquisitionAxis
= exam_AbilityServicesNetworkMember
Pro Forma Additional Expenses [Member]                      
Note 3 - Acquisitions (Details) [Line Items]                      
Business Combination, Pro Forma Information, Adjustments to Interest and Other Expenses Related to Funding of Acquisition $ 103,000exam_BusinessCombinationProFormaInformationAdjustmentsToInterestAndOtherExpensesRelatedToFundingOfAcquisition
/ us-gaap_BusinessAcquisitionAxis
= exam_ProFormaAdditionalExpensesMember