CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
Cash flows from operating activities
Net loss attributable to Coupa Software Incorporated	$ (379,039)	$ (180,117)	$ (90,832)
Net loss and adjustment attributable to redeemable non-controlling interests (Note 3)	9,933	0	0
Net loss	(369,106)	(180,117)	(90,832)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	146,392	72,105	28,553
Amortization of premium on marketable securities, net	377	1,038	325
Amortization of deferred commissions	18,600	14,704	9,556
Amortization of debt discount and issuance costs	115,688	86,541	35,922
Stock-based compensation	199,895	149,423	81,376
Loss (gain) on conversion of convertible senior notes	357	(3,154)	0
Repayments of convertible senior notes attributable to debt discount (Note 10)	(1,338)	(27,409)	0
Other	(2,876)	3,761	(1,381)
Changes in operating assets and liabilities net of effects from acquisitions:
Accounts receivable	(25,752)	(36,757)	(11,154)
Prepaid expenses and other current assets	(1,447)	2,954	(16,380)
Other assets	23,266	6,786	9,176
Deferred commissions	(35,906)	(24,157)	(26,231)
Accounts payable	(326)	(851)	(3,720)
Accrued expenses and other liabilities	(28,569)	(65,995)	(20,727)
Deferred revenue	128,835	79,330	73,673
Net cash provided by operating activities	168,090	78,202	68,156
Cash flows from investing activities
Purchases of marketable securities	(176,716)	(1,017,751)	(583,151)
Maturities of marketable securities	140,300	396,595	66,363
Sale of marketable securities	94,916	835,123	199,314
Acquisitions, net of cash acquired	(47,312)	(863,597)	(308,406)
Purchases of other investments	(10,000)	0	0
Purchases of property and equipment	(13,853)	(11,492)	(11,970)
Net cash used in investing activities	(12,665)	(661,122)	(637,850)
Cash flows from financing activities
Investment from redeemable non-controlling interests	2,223	0	0
Proceeds from issuance of convertible senior notes, net of issuance costs	0	1,355,066	786,157
Purchase of capped calls	0	(192,786)	(118,738)
Repayments of convertible senior notes	(5,751)	(555,352)	0
Proceeds from the exercise of common stock options	9,446	19,232	17,781
Proceeds from issuance of common stock for employee stock purchase plan	21,626	15,631	11,455
Net cash provided by financing activities	27,544	641,791	696,655
Effects of foreign currency exchange rates on cash, cash equivalents, and restricted cash	(219)	438	0
Net increase in cash, cash equivalents, and restricted cash	182,750	59,309	126,961
Cash, cash equivalents, and restricted cash at beginning of year	327,589	268,280	141,319
Cash, cash equivalents, and restricted cash at end of period	510,339	327,589	268,280
Reconciliation of cash, cash equivalents, and restricted cash to the consolidated balance sheets
Cash and cash equivalents	$ 506,459	$ 323,284	$ 268,045
Restricted Cash, Statement of Financial Position [Extensible Enumeration]	Other Assets	Other Assets	Other Assets
Restricted cash included in other assets	$ 3,880	$ 4,305	$ 235
Total cash, cash equivalents, and restricted cash	510,339	327,589	268,280
Supplemental disclosure of cash flow data
Cash paid for income taxes	5,006	3,328	2,294
Cash paid for interest	6,195	3,640	1,489
Supplemental disclosure of non-cash investing and financing activities
Issuance of common stock in connection with acquisitions	0	668,026	0
Property and equipment included in accounts payable and accrued expenses and other current liabilities	$ 632	$ 321	$ 337