FAIR VALUE MEASUREMENTS

6 Months Ended

Sep. 30, 2023

Cash, cash equivalents, and available-for-sale investments were as follows (in thousands):


As of September 30, 2023	Amortized Costs		Gross Unrealized Gain		Gross Unrealized Loss		Estimated Fair Value		Cash and Cash Equivalents		Restricted Cash (Current & Non-current)		Short-Term Investments
Cash	$	70,729	$	—	$	—	$	70,729	$	70,729	$	—	$	—
Level 1:
Money market funds	64,070		—		—		64,070		63,087		983		—
Treasury securities	599		—		—		599		—		—		599
Subtotal	135,398		—		—		135,398		133,816		983		599
Level 2:
Term deposit	10,214		—		—		10,214		10,214		—		—
Commercial paper	4,146		—		(1)		4,145		—				4,145

Subtotal	14,360		—		(1)		14,359		10,214		—		4,145
Total assets	$	149,758	$	—	$	(1)	$	149,757	$	144,030	$	983	$	4,744


As of March 31, 2023	Amortized Costs		Gross Unrealized Gain		Gross Unrealized Loss		Estimated Fair Value		Cash and Cash Equivalents		Restricted Cash (Current & Non-current)		Short-Term Investments
Cash	$	95,828	$	—	$	—	$	95,828	$	95,828	$	—	$	—
Level 1:
Money market funds	8,935		—		—		8,935		8,935		—		—
Treasury securities	1,599		4		(1)		1,602		—		—		1,602
Subtotal	106,362		4		(1)		106,365		104,763		—		1,602
Level 2:
Certificate of deposit	1,329		—		—		1,329		—		1,329		—
Commercial paper	8,610		—		(2)		8,608		6,637		—		1,971
Corporate debt	22,625		55		(25)		22,655		—		—		22,655
Subtotal	32,564		55		(27)		32,592		6,637		1,329		24,626
Total assets	$	138,926	$	59	$	(28)	$	138,957	$	111,400	$	1,329	$	26,228

The restricted cash component of the money market funds is comprised of letters of credit securing leases for certain office facilities.

The Company considers its investments available to support its current operations and has classified investments in debt securities as available-for-sale securities. The Company does not intend to sell any of its investments that are in unrealized loss positions and, as of September 30, 2023, has determined that it is not more likely than not that it will be required to sell any of these investments before recovery of the entire amortized cost basis.

The Company regularly reviews the changes to the rating of its securities at the individual security level by rating agencies and reasonably monitors the surrounding economic conditions to assess the risk of expected credit losses. As of September 30, 2023, the Company did not record any allowance for credit losses on its investments.

The Company uses the Black-Scholes option-pricing valuation model to value its detachable warrants from inception and at each reporting period. Changes in the fair values of the detachable warrants liability are recorded as loss on warrants remeasurement within Other (expense) income, net in the condensed consolidated statements of operations.

The following table presents additional information about valuation techniques and inputs used for the detachable warrants (see Note 6, Convertible Senior Notes and Term Loan) that are measured at fair value and categorized within Level 3 as of September 30, 2023 and March 31, 2023 (dollars in thousands):


	September 30, 2023		March 31, 2023
Estimated fair value of detachable warrants	$	2,966	$	5,497
Unobservable inputs:
Stock volatility	80.0%		67.2%
Risk-free rate	4.7%		3.6%
Expected term	3.9 years		4.4 years

As of September 30, 2023 and March 31, 2023, the estimated fair value of the Company's convertible senior notes due in 2024 was $60.2 million and $57.3 million, respectively, and the estimated fair value of the Company’s convertible senior notes due in 2028 was $192.0 million and $183.0 million, respectively (see Note 6, Convertible Senior Notes and Term Loan). The fair value of the convertible senior notes was determined based on the closing price of each of the securities on the last trading day of the reporting period, and each is considered to be Level 2 in the fair value hierarchy due to limited trading activity of the debt instruments. As of September 30, 2023 and March 31, 2023, the carrying value of the Company’s Term Loan approximates its estimated fair value.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

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