NET (LOSS) INCOME PER COMMON SHARE ATTRIBUTABLE TO VERINT SYSTEMS INC. - Schedule of Anti-dilutive Securities (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2021	Jul. 31, 2020	Jul. 31, 2021	Jul. 31, 2020
Stock options and restricted stock-based awards
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive securities excluded from computation of earnings per share, (in shares)	2,209	392	2,034	1,329
2021 Notes
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive securities excluded from computation of earnings per share, (in shares)	5,074	0	3,196	0
2014 Notes
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive securities excluded from computation of earnings per share, (in shares)	9,541	6,137	9,541	6,171
Warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive securities excluded from computation of earnings per share, (in shares)	9,865	6,205	9,865	6,205
Series A Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive securities excluded from computation of earnings per share, (in shares)	5,498	3,495	5,498	1,747
Series B Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive securities excluded from computation of earnings per share, (in shares)	3,980	0	2,573	0