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Consolidated Statements of Cash Flows
$ in Thousands
 12 Months Ended
Jan. 31, 2022
USD ($)
Jan. 31, 2021
USD ($)
Jan. 31, 2020
USD ($)
Operating activities:      
Net loss $ (93,259) $ (94,692) $ (121,544)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:      
Depreciation and amortization expense 16,783 10,612 8,069
Bad debt expense 1,253 2,547 1,246
Stock-based compensation expense 73,480 72,294 67,770
Amortization of operating lease right-of-use assets 9,296 12,203 11,124
Other, net 582 (489) 120
Changes in operating assets and liabilities:      
Accounts receivable (6,106) (17,990) (26,981)
Prepaid expenses and other current assets 4,238 (5,463) 268
Costs to obtain revenue contracts (9,113) 2,429 (18,344)
Other long term assets (231) (1,630) (2,629)
Accounts payable, accrued expenses and other current liabilities (494) (1,976) 8,267
Unearned revenue 33,262 12,702 42,345
Operating lease liabilities (6,644) 8,937 (1,044)
Other long term liabilities (1,198) 1,720 565
Net cash provided by (used in) operating activities 21,849 1,204 (30,768)
Investing activities:      
Maturities of marketable securities 0 0 51,197
Capital expenditures (13,418) (65,111) (11,889)
Net cash (used in) provided by investing activities (13,418) (65,111) 39,308
Financing activities:      
Proceeds from common stock offering, net of underwriting discounts and commissions 0 0 147,000
Payments of common stock deferred offering costs 0 0 (530)
Proceeds from exercise of stock options 19,228 16,464 14,893
Payments of deferred financing costs (263) (869) (260)
Proceeds, net from employee stock purchase plan withholdings 5,652 6,953 7,270
Net cash provided by financing activities 24,617 22,548 168,373
Effect of exchange rate changes on cash, cash equivalents and restricted cash (2,249) 3,594 (492)
Net increase (decrease) in cash, cash equivalents and restricted cash 30,799 (37,765) 176,421
Cash, cash equivalents and restricted cash at beginning of period 230,411 268,176 91,755
Cash, cash equivalents and restricted cash at end of period 261,210 230,411 268,176
Supplemental disclosure of cash flow data:      
Cash paid on interest 75 54 41
Cash paid on income taxes 1,325 1,413 531
Supplemental Cash Flow Information [Abstract]      
Cash and cash equivalents 261,210 230,411 256,076
Restricted cash 0 0 12,100
Cash, cash equivalents and restricted cash at end of period $ 261,210 $ 230,411 $ 268,176