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Balance Sheet Components
 12 Months Ended
Jan. 31, 2022
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Balance Sheet Components Balance Sheet Components
Prepaid Expenses and Other Current Assets
Prepaid expenses and other current assets consisted of the following (in thousands):
January 31,
20222021
Prepaid software licenses$26,085 $20,596 
Prepaid expenses18,829 12,220 
Prepaid marketing17,629 10,852 
Other current assets12,783 4,566 
Prepaid hosting services4,026 5,383 
Prepaid expenses and other current assets$79,352 $53,617 
Property and Equipment, Net
Property and equipment, net consisted of the following (in thousands):
January 31,
20222021
Data center and other computer equipment$198,297 $146,220 
Capitalized internal-use software and website development costs70,476 44,358 
Leasehold improvements22,029 19,733 
Purchased software5,232 3,211 
Furniture and equipment7,291 6,498 
Construction in process99,030 35,528 
402,355 255,548 
Less: Accumulated depreciation and amortization(141,778)(88,534)
Property and equipment, net$260,577 $167,014 
Construction in process mainly includes data center equipment purchased that has not yet been placed in service. Data center equipment that was purchased but not yet been placed into service was $89.8 million and $30.0 million as of January 31, 2022 and January 31, 2021, respectively.
Depreciation and amortization expense of property and equipment was $54.4 million, $38.7 million, and $23.0 million, during the fiscal years ended January 31, 2022, January 31, 2021, and January 31, 2020, respectively.
There were no impairments for property and equipment during the fiscal years ended January 31, 2022, January 31, 2021, and January 31, 2020. The Company capitalized $30.7 million, $14.0 million, and $8.1 million in internal-use software and website development costs during the fiscal years ended January 31, 2022, January 31, 2021, and January 31, 2020, respectively. Amortization expense associated with internal-use software and website development costs totaled $12.4 million, $7.9 million and $6.2 million during the fiscal years ended January 31, 2022, January 31, 2021, and January 31, 2020, respectively. The net book value of capitalized internal-use software and website development costs was $38.6 million and $19.5 million as of January 31, 2022 and January 31, 2021, respectively.
Intangible Assets, Net
Total intangible assets, net consisted of the following (dollars in thousands):
January 31, 2022Weighted-Average Remaining Useful Life
Gross Carrying AmountAccumulated AmortizationNet Amount
(in months)
Developed technology$97,668 $12,000 $85,668 79
Customer relationships12,045 1,973 10,072 72
Other acquired intangible assets2,397 801 1,596 89
Total$112,110 $14,774 $97,336 
January 31, 2021Weighted-Average Remaining Useful Life
Gross Carrying AmountAccumulated AmortizationNet Amount
(in months)
Developed technology$14,513 $2,193 $12,320 56
Customer relationships3,769649 3,120 54
Other acquired intangible assets399 162 237 185
Total$18,681 $3,004 $15,677 
Amortization expense of intangible assets was $12.9 million, $1.4 million, and $0.5 million, during the fiscal years ended January 31, 2022, January 31, 2021, and January 31, 2020, respectively. Amortization expense of other acquired intangible assets is recorded within cost of revenue, research and development expense and general and administrative expense in the consolidated statements of operations.
The estimated aggregate future amortization expense of intangible assets as of January 31, 2022 is as follows (in thousands):
Total
Fiscal 2023$16,300 
Fiscal 202415,608 
Fiscal 202515,524 
Fiscal 202614,437 
Fiscal 202712,261 
Thereafter23,206 
Total amortization expense$97,336 
The developed technology, customer relationships, and other acquired intangible assets are amortized over their estimated useful lives, generally on a straight-line basis for periods ranging from 2 to 20 years.
Goodwill
The changes in goodwill during the fiscal year ended January 31, 2022 consisted of the following (in thousands):
Amounts
Goodwill as of January 31, 2021$83,566 
Goodwill acquired(1)
334,294 
Foreign currency translation(1,415)
Goodwill as of January 31, 2022$416,445 
__________________________________
(1)Goodwill acquired resulted from the acquisition of Humio and SecureCircle. Refer to Note 14, Acquisitions, for additional information.
Other Assets, Noncurrent
Other assets, noncurrent consisted of the following (in thousands):
January 31,
20222021
Other assets$13,348 $8,627 
Deferred income tax asset4,802 1,328 
Deferred finance cost4,620 4,355 
Deposits2,576 2,802 
Other assets, noncurrent$25,346 $17,112 
Accrued Expenses
Accrued expenses consisted of the following (in thousands):
January 31,
20222021
Web hosting services$23,711 $14,187 
Other accrued expenses14,451 11,372 
Accrued legal and accounting14,166 5,709 
Accrued purchases of property and equipment10,878 4,570 
Accrued interest expense10,375 687 
Accrued marketing9,801 14,592 
Accrued expenses$83,382 $51,117 
Accrued Payroll and Benefits
Accrued payroll and benefits consisted of the following (in thousands):
January 31,
20222021
Accrued commissions$47,298 $32,300 
Accrued payroll and related expenses24,910 16,528 
Accrued bonuses17,591 12,110 
Employee Stock Purchase Plan14,764 10,969 
Accrued payroll and benefits$104,563 $71,907 
In April 2020, the Company began deferring payment on its share of payroll taxes owed, as permitted by the CARES Act, through December 31, 2020. As of January 31, 2022, the Company had deferred $5.1 million of payroll taxes in other current liabilities.
Other Current Liabilities
Other current liabilities consisted of the following (in thousands):
January 31,
20222021
Other current liabilities$12,820 $9,652 
Income tax payable5,781 2,639 
Accrued taxes4,914 2,837 
Customer deposits1,414 2,371 
Other current liabilities$24,929 $17,499