XML 30 R50.htm IDEA: XBRL DOCUMENT v2.4.1.9
Property, Equipment and Capitalized Software - Text (Details) (USD $)
3 Months Ended 12 Months Ended
Dec. 31, 2014
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Property, Equipment and Capitalized Software [Line Items]        
Property, equipment and capitalized software, gross $ 27,635,000us-gaap_PropertyPlantAndEquipmentGross $ 27,635,000us-gaap_PropertyPlantAndEquipmentGross $ 28,387,000us-gaap_PropertyPlantAndEquipmentGross  
Capitalized software costs, additions   1,683,000us-gaap_CapitalizedComputerSoftwareAdditions 1,686,000us-gaap_CapitalizedComputerSoftwareAdditions  
Capitalized software costs, accumulated amortization 4,200,000us-gaap_CapitalizedComputerSoftwareAccumulatedAmortization 4,200,000us-gaap_CapitalizedComputerSoftwareAccumulatedAmortization 3,400,000us-gaap_CapitalizedComputerSoftwareAccumulatedAmortization  
Depreciation and amortization expense   2,974,000us-gaap_DepreciationDepletionAndAmortization 2,796,000us-gaap_DepreciationDepletionAndAmortization 2,919,000us-gaap_DepreciationDepletionAndAmortization
Asset impairment charges 1,544,000us-gaap_AssetImpairmentCharges      
Capitalized Software [Member]        
Property, Equipment and Capitalized Software [Line Items]        
Depreciation and amortization expense   $ 1,200,000us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= ctg_CapitalizedSoftwareMember
$ 1,200,000us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= ctg_CapitalizedSoftwareMember
$ 1,700,000us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= ctg_CapitalizedSoftwareMember