Summary of Significant Accounting Policies

3 Months Ended

Apr. 30, 2021

Summary of Significant Accounting Policies

Concentrations of Risk and Significant Customers

The Company’s financial instruments that are exposed to concentrations of credit risk consist primarily of cash and cash equivalents, available-for-sale investments, and accounts receivable. All of the Company’s cash and cash equivalents and investments are invested in money market funds, United States (“U.S.”) Treasury securities, commercial paper, corporate debt securities, or U.S. Government agency securities that management believes to be of high credit quality.

No single customer accounted for 10% of the total accounts receivable balance as of April 30, 2021 or January 31, 2021. No single customer represented 10% or more of revenue for the three months ended April 30, 2021 or 2020.

Segment Information

The Company manages its operations and allocates resources as one operating segment. The Company’s chief operating decision maker (“CODM”) is its chief executive officer, who reviews financial information presented on a consolidated basis for purposes of making operating decisions, assessing financial performance, and allocating resources. Refer to Note 15, “Geographic Information” for information regarding the Company's long-lived assets and revenue by geography.

Significant Accounting Policies

There have been no significant changes to our significant accounting policies as compared to those described in our Annual Report on Form 10-K for the fiscal year ended January 31, 2021, other than as set forth below.

Stock-Based Compensation

The Company recognizes compensation expense for all stock-based payment awards, including stock options, restricted stock units (“RSUs”), and performance stock units (“PSUs”), based on the estimated fair value of the award on the grant date.

The Company estimates the fair value of stock options issued to employees on the date of grant using the Black-Scholes option pricing model, which is impacted by the estimated fair value of the Company’s common stock, as well as certain assumptions including the expected volatility over the term of the option awards, the expected term of the awards, risk-free interest rates and the expected dividend yield. Assumptions and estimates used in the determination of the fair value of stock options are as follows:

Expected volatility—Expected volatility is a measure of the amount by which the stock price is expected to fluctuate. Since the Company does not have sufficient trading history for its common stock, it estimates the expected volatility of its stock options by taking the average historical volatility of a group of comparable publicly traded companies over a period equal to the expected life of the options.

Expected term—The Company determines the expected term based on the average period the stock options are expected to remain outstanding, generally calculated as the midpoint of the stock options’ vesting term

and contractual expiration period, as the Company does not have sufficient historical information to develop reasonable expectations about future exercise patterns and post-vesting employment termination behavior.

Risk-free rate—The Company uses the U.S. Treasury yield for its risk-free interest rate that corresponds with the expected term.

Expected dividend yield—The Company utilizes a dividend yield of zero, as it does not currently issue dividends and does not expect to in the future.

The Company estimates the fair value of RSUs and PSUs at our stock price on the grant date.

The Company estimates the fair value of shares to be issued under the employee stock purchase plan (the “ESPP”) on the first day of the offering period using the Black-Scholes valuation model, which is impacted by the estimated fair value of the Company’s common stock, as well as certain assumptions including the expected volatility over the term of the offering period, the expected term of the awards, risk-free interest rates and the expected dividend yield. Assumptions used in the determination of the fair value of the ESPP are the same as those used in the determination of the fair value of our stock options.

The Company generally recognizes compensation expense for employee stock-based payment awards on a straight-line basis over the period during which an award recipient is required to provide services in exchange for the award (generally the vesting period of the award), with the exception of PSUs which are recognized using the accelerated attribution method. The Company accounts for forfeitures as they occur.

The fair value of each non-employee stock option is estimated at the date of grant using the Black-Scholes option pricing model and is not remeasured over the vesting term. Assumptions used in valuing non-employee stock options are generally consistent with those used for employee stock options with the exception that the expected term is over the contractual life.

Recently Adopted Accounting Pronouncements

In August 2020, the FASB issued Accounting Standard Update No. 2020-06, Debt—Debt with Conversion Options (“Subtopic 470-20”) and Derivatives and Hedging—Contracts in Entity’s Own Equity (“Subtopic 815-40”) (“ASU 2020-06”), which simplifies the accounting for certain financial instruments with characteristics of liabilities and equity, including convertible instruments and contracts on an entity's own equity. ASU 2020-06 also improves and amends the related Earnings Per Share guidance for both Subtopics. The ASU is part of the FASB's simplification initiative, which aims to reduce unnecessary complexity in U.S. GAAP. The Company early adopted ASU 2020-06 as of February 1, 2021 using the modified retrospective approach. As a result of the adoption of ASU 2020-06, the Convertible Notes due July 2025 are no longer bifurcated into separate liability and equity components in the April 30, 2021 condensed consolidated balance sheets. Rather, the $287.5 million principal amount of the Company’s Convertible Notes was classified only as a liability in the April 30, 2021 condensed consolidated balance sheets. Upon adoption, the Company recognized an increase to long-term debt of $61.7 million, a decrease to additional paid in capital of $68.5 million, and a decrease in accumulated deficit of $6.7 million on its condensed consolidated balance sheets as of February 1, 2021. The adoption did not affect the Company’s condensed

consolidated statements of operations or condensed consolidated statements of cash flows. Refer to Note 9. “Debt and Financing Instruments ” for further information.


	As of January 31, 2021		ASU 2020-06 Adoption Adjustment		As of February 1, 2021
	(in thousands)
Liabilities
Outstanding principal	$	287,500	$	—	$	287,500
Unamortized debt discount and issuance costs	(69,972)		61,736		(8,236)
Net carrying amount	$	217,528	$	61,736	$	279,264

Equity
Additional paid-in-capital	$	(614,494)	$	68,478	$	(546,016)
Accumulated deficit	(248,110)		6,742		(241,368)