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Business Segment Information | 12 Months Ended
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Mar. 31, 2026
Segment Reporting [Abstract] |
Business Segment Information | Note 13. Business Segment Information Operating segments are defined as components of an enterprise about which separate financial information is available that is evaluated on a regular basis by the CODM in deciding how to allocate resources to an individual segment and in assessing performance. The Company identified one operating segment in fiscal 2026, named the R&D segment, which did not impact prior periods. During fiscal 2026, the Company's operating segment was as follows: Research & Development The R&D segment focuses on providing testing of drugs and drug candidates in 3D human tissue models of liver and intestine, offering partners liver and intestinal toxicology insights using its NAM models. The Company plans to work with pharmaceutical and biotech companies at all stages of drug development to reduce the significant risk and cost of bringing therapeutics to market through the regulatory process and offer bespoke services in the areas of investigational toxicology, mechanism of drug action elucidation, and other applications of these complex human tissue models. For purposes of evaluating performance and allocating resources, the Company’s CODM, its Executive Chairman, regularly reviews Consolidated Net Loss as reported in the Company’s Consolidated Statements of Operations and Comprehensive Loss as compared to budget. The measure of segment assets is reported in the Consolidated Balance Sheets as Total Consolidated Assets. In addition to the significant expense categories included within Consolidated Net Loss presented in the Company’s Consolidated Statements of Operations and Other Comprehensive Loss, see below for disaggregated expense amounts for the years ended March 31, 2026 and 2025 (in thousands):
| Year Ended |  |  | Year Ended |
| March 31, 2026 |  |  | March 31, 2025 |
Revenue |  |  |  |  |
Royalty revenue | $ | 131 |  |  | $ | 119 |
Product revenue |  | — |  |  |  | 25 |
Total revenue |  | 131 |  |  |  | 144 |
Operating expenses |  |  |  |  |
Cost of revenues |  | — |  |  |  | 5 |
Research and development (a) (b) |  | 3,934 |  |  |  | 4,712 |
Selling, general, and administrative expenses (a)(b) |  | 7,166 |  |  |  | 7,245 |
Non-cash stock-based compensation (see Note 6) |  | 303 |  |  |  | 532 |
Depreciation and amortization (see Note 3) |  | 215 |  |  |  | 266 |
Total operating expenses | $ | 11,618 |  |  | $ | 12,760 |
Consolidated operating loss | $ | (11,487 | ) |  | $ | (12,616 | )
(a) Stock-based compensation expense of $56,000 and $86,000 related to research and development and $247,000 and $446,000, related to selling, general, and administration have been excluded for the years ended March 31, 2026 and 2025, respectively. (b) Depreciation and amortization expense of $199,000 and $227,000 related to research and development and $16,000 and $39,000 related to selling, general, and administration have been excluded for the years ended March 31, 2026 and 2025, respectively.

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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 21 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-21 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name 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