Annual report pursuant to Section 13 and 15(d)

Acquisition Purchase Price Allocation (Details)

v2.4.1.9
Acquisition Purchase Price Allocation (Details) (USD $)
0 Months Ended
Oct. 31, 2014
Dec. 31, 2014
Dec. 31, 2013
Aug. 31, 2013
Business Acquisition [Line Items]        
Contingent consideration   $ 26,542,000us-gaap_BusinessCombinationContingentConsiderationLiability   $ 500,000us-gaap_BusinessCombinationContingentConsiderationLiability
Goodwill   15,545,000us-gaap_Goodwill 0us-gaap_Goodwill  
RedPath Integrated Pathology, Inc        
Business Acquisition [Line Items]        
Cash 13,572,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= pdii_RedPathIntegratedPathologyIncMember
     
Cash 22,066,000us-gaap_BusinessCombinationConsiderationTransferredOther1
/ us-gaap_BusinessAcquisitionAxis
= pdii_RedPathIntegratedPathologyIncMember
     
Common stock 1,820,000us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable
/ us-gaap_BusinessAcquisitionAxis
= pdii_RedPathIntegratedPathologyIncMember
     
Contingent consideration 23,886,000us-gaap_BusinessCombinationContingentConsiderationLiability
/ us-gaap_BusinessAcquisitionAxis
= pdii_RedPathIntegratedPathologyIncMember
     
Total consideration 44,854,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= pdii_RedPathIntegratedPathologyIncMember
     
Goodwill 15,545,000us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= pdii_RedPathIntegratedPathologyIncMember
     
Acquired intangible assets 34,492,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
/ us-gaap_BusinessAcquisitionAxis
= pdii_RedPathIntegratedPathologyIncMember
     
Current assets 5,465,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets
/ us-gaap_BusinessAcquisitionAxis
= pdii_RedPathIntegratedPathologyIncMember
     
Other long-term assets 366,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentAssets
/ us-gaap_BusinessAcquisitionAxis
= pdii_RedPathIntegratedPathologyIncMember
     
Current liabilities (4,809,000)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities
/ us-gaap_BusinessAcquisitionAxis
= pdii_RedPathIntegratedPathologyIncMember
     
Deferred income tax liability (6,205,000)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities
/ us-gaap_BusinessAcquisitionAxis
= pdii_RedPathIntegratedPathologyIncMember
     
Total acquired assets 44,854,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet
/ us-gaap_BusinessAcquisitionAxis
= pdii_RedPathIntegratedPathologyIncMember
     
Diagnostic Test - Pancreas | RedPath Integrated Pathology, Inc        
Business Acquisition [Line Items]        
Acquired intangible assets 16,141,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
/ us-gaap_BusinessAcquisitionAxis
= pdii_RedPathIntegratedPathologyIncMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= pdii_DiagnosticTestPancreasMember
     
Diagnostic Test - Barrett's RedPath | RedPath Integrated Pathology, Inc        
Business Acquisition [Line Items]        
Acquired intangible assets 18,351,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
/ us-gaap_BusinessAcquisitionAxis
= pdii_RedPathIntegratedPathologyIncMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= pdii_DiagnosticTestBarrettsRedPathMember
     
Notes Payable, Other Payables        
Business Acquisition [Line Items]        
Subordinated note payable 11,000,000us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NotesPayableOtherPayablesMember
     
Notes Payable, Other Payables | RedPath Integrated Pathology, Inc        
Business Acquisition [Line Items]        
Subordinated note payable $ 7,396,000us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred
/ us-gaap_BusinessAcquisitionAxis
= pdii_RedPathIntegratedPathologyIncMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NotesPayableOtherPayablesMember