Quarterly report pursuant to Section 13 or 15(d)

Revenue and Accounts Receivable - Schedule of Revenue by Service Type (Detail)

v2.4.1.9
Revenue and Accounts Receivable - Schedule of Revenue by Service Type (Detail) (USD $)
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Health Care Organization, Receivable and Revenue Disclosures [Line Items]    
Revenue $ 4,370,327us-gaap_Revenues $ 1,430,375us-gaap_Revenues
Biopharma Services [Member]    
Health Care Organization, Receivable and Revenue Disclosures [Line Items]    
Revenue 3,331,090us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= cgix_BiopharmaServicesMember 		491,250us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= cgix_BiopharmaServicesMember
Clinical Services [Member]    
Health Care Organization, Receivable and Revenue Disclosures [Line Items]    
Revenue 873,041us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= cgix_ClinicalServicesMember 		939,125us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= cgix_ClinicalServicesMember
Discovery Services [Member]    
Health Care Organization, Receivable and Revenue Disclosures [Line Items]    
Revenue $ 166,196us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= cgix_DiscoveryServicesMember 		$ 0us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= cgix_DiscoveryServicesMember