CASH, CASH EQUIVALENTS AND SHORT-TERM INVESTMENTS (Tables)

3 Months Ended

Apr. 30, 2020

Cash, Cash Equivalents, and Short-term Investments [Abstract]

Schedule of Cash, Cash Equivalents and Short-term Investments [Table Text Block]

The following tables summarize our cash, cash equivalents, and short-term investments as of April 30, 2020 and January 31, 2020:

	April 30, 2020
(in thousands)	Cost Basis		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
Cash and cash equivalents:
Cash and bank time deposits	$	411,926	$	—	$	—	$	411,926
Money market funds	144,745		—		—		144,745
Total cash and cash equivalents	$	556,671	$	—	$	—	$	556,671
Short-term investments:
Bank time deposits	$	19,741	$	—	$	—	$	19,741
Total short-term investments	$	19,741	$	—	$	—	$	19,741

	January 31, 2020
(in thousands)	Cost Basis		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
Cash and cash equivalents:
Cash and bank time deposits	$	379,057	$	—	$	—	$	379,057
Money market funds	89		—		—		89
Total cash and cash equivalents	$	379,146	$	—	$	—	$	379,146
Short-term investments:
Bank time deposits	$	20,215	$	—	$	—	$	20,215
Total short-term investments	$	20,215	$	—	$	—	$	20,215