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CASH, CASH EQUIVALENTS AND SHORT-TERM INVESTMENTS	12 Months Ended
CASH, CASH EQUIVALENTS AND SHORT-TERM INVESTMENTS	Jan. 31, 2018
CASH, CASH EQUIVALENTS AND SHORT-TERM INVESTMENTS
CASH, CASH EQUIVALENTS AND SHORT-TERM INVESTMENTS	NOTE 5 — CASH, CASH EQUIVALENTS AND SHORT-TERM INVESTMENTS The Company considers all liquid investments with original maturities of three months or less at the time of purchase to be cash equivalents. Short-term investments as of January 31, 2018 and 2017 consisted solely of certificates of deposit purchased from Bank of America (the “Bank”) with weighted average initial maturities of 293 days and 185 days, respectively (the “CDs”). The Company has the intent and ability to hold the CDs until they mature, and they are carried at cost plus accrued interest which approximates fair value. The total carrying value amounts as of January 31, 2018 and 2017 included accrued interest of $1.9 million and $0.8 million, respectively. Interest income is recorded when earned and is included in other income, net. As of January 31, 2018 and 2017, the weighted average annual interest rates of the CDs classified as short-term investments were 1.5% and 1.1%, respectively. The Company has cash on deposit in excess of federally insured limits at the Bank, has purchased CDs from the Bank and has money market accounts at the Bank. Management does not believe that maintaining substantially all such assets with the Bank represents a material risk.