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Common Stock Options (Details 1) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Outstanding at End of Period 152,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber 304,500us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Remaining contractual life, Outstanding 1 year 9 months 3 days  
Weighted average exercise price, Exercisable $ 1.34us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice  
Exercisable 52,000QTXB_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisable  
Weighted average exercise price, Exercisable $ 0.85us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingPeriodIncreaseDecreaseWeightedAverageExercisePrice  
Option1 [Member]    
Exercise price $ 0.80us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1
/ us-gaap_AwardTypeAxis
= QTXB_Option1Member
 
Outstanding at End of Period 1,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_AwardTypeAxis
= QTXB_Option1Member
 
Remaining contractual life, Outstanding 3 years 1 month 27 days  
Weighted average exercise price, Exercisable $ 0.80us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= QTXB_Option1Member
 
Exercisable 1,000QTXB_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisable
/ us-gaap_AwardTypeAxis
= QTXB_Option1Member
 
Weighted average exercise price, Exercisable $ 0.80us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingPeriodIncreaseDecreaseWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= QTXB_Option1Member
 
Option2 [Member]    
Exercise price $ 0.85us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1
/ us-gaap_AwardTypeAxis
= QTXB_Option2Member
 
Outstanding at End of Period 51,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_AwardTypeAxis
= QTXB_Option2Member
 
Remaining contractual life, Outstanding 29 months 7 days  
Weighted average exercise price, Exercisable $ 0.85us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= QTXB_Option2Member
 
Exercisable 51,000QTXB_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisable
/ us-gaap_AwardTypeAxis
= QTXB_Option2Member
 
Weighted average exercise price, Exercisable $ 0.85us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingPeriodIncreaseDecreaseWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= QTXB_Option2Member
 
Option3 [Member]    
Exercise price $ 1.60us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1
/ us-gaap_AwardTypeAxis
= QTXB_Option3Member
 
Outstanding at End of Period 100,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_AwardTypeAxis
= QTXB_Option3Member
 
Remaining contractual life, Outstanding 13 months 4 days  
Weighted average exercise price, Exercisable $ 1.00us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= QTXB_Option3Member
 
Exercisable     
Weighted average exercise price, Exercisable