Annual report pursuant to Section 13 and 15(d)

Segment Information (Details)

v2.4.1.9
Segment Information (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Segment Reporting Information [Line Items]    
Revenue $ 119,935us-gaap_Revenues $ 146,534us-gaap_Revenues
Operating loss (13,470)us-gaap_OperatingIncomeLoss (1,437)us-gaap_OperatingIncomeLoss
Capital expenditures 2,851us-gaap_PaymentsToAcquirePropertyPlantAndEquipment 1,818us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Depreciation and amortization expense 1,842pdii_DepreciationDepletionandAmortizationContinuingOperations 1,190pdii_DepreciationDepletionandAmortizationContinuingOperations
Total assets 115,906us-gaap_Assets 69,064us-gaap_Assets
Commercial Services [Member]    
Segment Reporting Information [Line Items]    
Revenue 118,461us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= pdii_CommercialServicesMember
146,534us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= pdii_CommercialServicesMember
Operating loss (3,168)us-gaap_OperatingIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= pdii_CommercialServicesMember
(980)us-gaap_OperatingIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= pdii_CommercialServicesMember
Capital expenditures 1,580us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= pdii_CommercialServicesMember
1,818us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= pdii_CommercialServicesMember
Depreciation and amortization expense 1,001pdii_DepreciationDepletionandAmortizationContinuingOperations
/ us-gaap_StatementBusinessSegmentsAxis
= pdii_CommercialServicesMember
1,190pdii_DepreciationDepletionandAmortizationContinuingOperations
/ us-gaap_StatementBusinessSegmentsAxis
= pdii_CommercialServicesMember
Total assets 34,807us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= pdii_CommercialServicesMember
67,562us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= pdii_CommercialServicesMember
Diagnostic Services [Member]    
Segment Reporting Information [Line Items]    
Revenue 1,474us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= pdii_DiagnosticServicesMember
0us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= pdii_DiagnosticServicesMember
Operating loss (10,302)us-gaap_OperatingIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= pdii_DiagnosticServicesMember
(457)us-gaap_OperatingIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= pdii_DiagnosticServicesMember
Capital expenditures 1,271us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= pdii_DiagnosticServicesMember
0us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= pdii_DiagnosticServicesMember
Depreciation and amortization expense 841pdii_DepreciationDepletionandAmortizationContinuingOperations
/ us-gaap_StatementBusinessSegmentsAxis
= pdii_DiagnosticServicesMember
0pdii_DepreciationDepletionandAmortizationContinuingOperations
/ us-gaap_StatementBusinessSegmentsAxis
= pdii_DiagnosticServicesMember
Total assets $ 81,099us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= pdii_DiagnosticServicesMember
$ 1,502us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= pdii_DiagnosticServicesMember