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FAIR VALUE MEASUREMENTS (Tables) | 3 Months Ended
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Jun. 30, 2023
Fair Value Disclosures [Abstract] |
Schedule of Fair Value Measurements | Cash, cash equivalents, and available-for-sale investments were as follows (dollars in thousands):
As of June 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 |  | $ | 91,556 |  |  | $ | — |  |  | $ | — |  |  | $ | 91,556 |  |  | $ | 91,556 |  |  | $ | — |  |  | $ | — |  |  |
Level 1: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | 22,148 |  |  | — |  |  | — |  |  | 22,148 |  |  | 21,165 |  |  | 983 |  |  | — |  |  |
Treasury securities |  | 3,590 |  |  | — |  |  | (2) |  |  | 3,588 |  |  | — |  |  | — |  |  | 3,588 |  |  |
Subtotal |  | 117,294 |  |  | — |  |  | (2) |  |  | 117,292 |  |  | 112,721 |  |  | 983 |  |  | 3,588 |  |  |
Level 2: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Certificate of deposit |  | 4,290 |  |  | — |  |  | — |  |  | 4,290 |  |  | 4,290 |  |  | — |  |  | — |  |  |
Commercial paper |  | 15,357 |  |  | — |  |  | (2) |  |  | 15,355 |  |  | 5,218 |  |  |  |  | 10,137 |  |  |
Corporate debt |  | 2,223 |  |  |  |  | (2) |  |  | 2,221 |  |  | — |  |  |  |  | 2,221 |  |  |
Subtotal |  | 21,870 |  |  | — |  |  | (4) |  |  | 21,866 |  |  | 9,508 |  |  | — |  |  | 12,358 |  |  |
Total assets |  | $ | 139,164 |  |  | $ | — |  |  | $ | (6) |  |  | $ | 139,158 |  |  | $ | 122,229 |  |  | $ | 983 |  |  | $ | 15,946 |  |  |
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 |  |  |
Summary of Assumptions Used in Determination of Fair Value | 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 June 30, 2023 and March 31, 2023 (dollars in thousands):
| June 30, 2023 |  | March 31, 2023
Estimated fair value of detachable warrants | $ | 5,748 |  |  | $ | 5,497 |
Unobservable inputs: |  |  |
Stock volatility | 70.0% |  | 67.2%
Risk-free rate | 4.2% |  | 3.6%
Expected term | 4.1 years |  | 4.4 years

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- Definition Tabular disclosure of financial instruments measured at fair value, including those classified in shareholders' equity measured on a recurring or nonrecurring basis. Disclosures include, but are not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. Nonrecurring fair value measurements are those that are required or permitted in the statement of financial position in particular circumstances. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2C -SubTopic 10 -Topic 820 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2C Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-3 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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