Earnings (Loss) Per Share (Details)	12 Months Ended
Dec. 31, 2019 shares
Earnings (Loss) Per Share (Textual)
Number of share options exercised	6,200,000
Number of share warrants exercised	264,222,220

Number Of Share Warrants Exercised In Sharebased Payment Arrangement.

No definition available.

Name:	xtlb_NumberOfShareWarrantsExercisedInSharebasedPaymentArrangement
Namespace Prefix:	xtlb_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration