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Fair Value Measurements | 12 Months Ended
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Mar. 31, 2025
Fair Value Disclosures [Abstract] |
Fair Value Measurements | Fair Value Measurements Cash, cash equivalents, and available-for-sale investments were as follows (in thousands):
| As of March 31, 2025
| Amortized Costs |  |  |  | Gross Unrealized Loss |  | Estimated Fair Value |  | Cash and Cash Equivalents |  | Restricted Cash (Current & Non-current) |  | Short-Term Investments
Cash | $ | 64,765 |  |  |  |  | $ | — |  |  | $ | 64,765 |  |  | $ | 63,953 |  |  | $ | 812 |  |  | $ | — |
Level 1: |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds | 24,559 |  |  |  |  | — |  |  | 24,559 |  |  | 24,097 |  |  | 462 |  |  | — |
Total assets | $ | 89,324 |  |  |  |  | $ | — |  |  | $ | 89,324 |  |  | $ | 88,050 |  |  | $ | 1,274 |  |  | $ | — |
| As of March 31, 2024
| Amortized Costs |  |  |  | Gross Unrealized Loss |  | Estimated Fair Value |  | Cash and Cash Equivalents |  | Restricted Cash (Current & Non-current) |  | Short-Term Investments
Cash | $ | 53,943 |  |  |  |  | $ | — |  |  | $ | 53,943 |  |  | $ | 53,943 |  |  | $ | — |  |  | $ | — |
Level 1: |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds | 37,633 |  |  |  |  | — |  |  | 37,633 |  |  | 37,172 |  |  | 461 |  |  | — |
Subtotal | 91,576 |  |  |  |  | — |  |  | 91,576 |  |  | 91,115 |  |  | 461 |  |  | — |
Level 2: |  |  |  |  |  |  |  |  |  |  |  |  |
Term deposit | 25,147 |  |  |  |  | — |  |  | 25,147 |  |  | 25,147 |  |  | — |  |  | — |
Commercial paper | 1,049 |  |  |  |  | (1) |  |  | 1,048 |  |  | — |  |  | — |  |  | 1,048 |
Subtotal | 26,196 |  |  |  |  | (1) |  |  | 26,195 |  |  | 25,147 |  |  | — |  |  | 1,048 |
Total assets | $ | 117,772 |  |  |  |  | $ | (1) |  |  | $ | 117,771 |  |  | $ | 116,262 |  |  | $ | 461 |  |  | $ | 1,048 |
As of March 31, 2023, cash, cash equivalents and restricted cash of $112.7 million included $111.4 million and $1.3 million of cash and cash equivalents, restricted cash and non-current restricted cash, respectively. To support its current operations, the Company considers all highly liquid investments with an original maturity of three months or less to be cash equivalents. The restricted cash component of the money market funds is comprised of letters of credit securing leases for certain office facilities and an accrued holdback related to a business combination (see Note 1, The Company and Significant Accounting Policies). The Company uses the Black-Scholes option-pricing valuation model to value its detachable warrants from inception and at each reporting period. During the three months ended March 31, 2025, the Company used historical volatility to determine the fair value of the warrants liability due to the low trading volume and moneyness assessment as of March 31, 2025. Changes in the fair values of the detachable warrants liability are recorded as a gain (loss) on warrants remeasurement within other income (expense), net in the consolidated statements of operations and comprehensive loss. The following table presents additional information about valuation techniques and inputs used for the Warrants (see Note 8, Convertible Senior Notes and Term Loan) that are measured at fair value and categorized within Level 3 as of March 31, 2025 and March 31, 2024 (dollars in thousands):
| March 31, 2025 |  | March 31, 2024
Estimated fair value of detachable warrants | $ | 1,096 |  |  | $ | 3,321 |
Unobservable inputs: |  |  |
Stock volatility | 79.8 | % |  | 87.2 | %
Risk-free rate | 3.9 | % |  | 4.3 | %
Expected term | 2.4 years |  | 3.4 years
As of March 31, 2025 and March 31, 2024 the estimated fair value of the Company's convertible senior notes due in 2028 was $171.1 million and $161.7 million, respectively (see Note 8, 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 Level 2 in the fair value hierarchy due to limited trading activity of the debt instruments. As of March 31, 2025 and 2024, the carrying value of the Company's Term Loan approximates its estimated fair value.

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- 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. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 107 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-107 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 100 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-100 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2E -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2E Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 940 -SubTopic 820 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478119/940-820-50-1 + Details
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