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4. BALANCE SHEET DETAIL (Tables) | 6 Months Ended
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Sep. 30, 2025
BALANCE SHEET DETAIL |
Schedule of inventories | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​
​ | ​ | September 30, 2025 | ​ | March 31, 2025
​ | ​ | (In thousands)
Inventories: | ​ | ​
Work-in-progress |  | $ | 1,746 |  | $ | 1,769
Finished goods | ​ |  | 1,888 | ​ |  | 2,122
​ |  | $ | 3,634 |  | $ | 3,891
Schedule of accounts receivable, net | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | September 30, 2025 | ​ | March 31, 2025
​ | ​ | (In thousands)
Accounts receivable, net: | ​ | ​ | ​ | ​ | ​ | ​
Accounts receivable |  | $ | 1,630 |  | $ | 3,215
Less: Allowances for credit losses | ​ |  | (21) | ​ |  | (46)
​ |  | $ | 1,609 |  | $ | 3,169
Schedule of prepaid expenses and other current assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | September 30, 2025 | ​ | March 31, 2025
​ | ​ | (In thousands)
Prepaid expenses and other current assets: | ​ | ​ | ​ | ​ | ​ | ​
Prepaid tooling and masks | ​ | $ | 1,315 | ​ | $ | 1,834
Other receivables | ​ | ​ | 112 | ​ | ​ | 695
Other prepaid expenses and other current assets | ​ | ​ | 740 | ​ | ​ | 432
​ | ​ | $ | 2,167 | ​ | $ | 2,961
Schedule of property and equipment, net | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | September 30, 2025 | ​ | March 31, 2025
​ | ​ | (In thousands)
Property and equipment, net: | ​ | ​ | ​ | ​ | ​ | ​
Computer and other equipment | ​ | $ | 18,045 | ​ | $ | 17,733
Software | ​ | ​ | 4,426 | ​ | ​ | 4,426
Furniture and fixtures | ​ | ​ | 102 | ​ | ​ | 102
Leasehold improvements | ​ | ​ | 927 | ​ | ​ | 927
​ | ​ | ​ | 23,500 | ​ | ​ | 23,188
Less: Accumulated depreciation | ​ | ​ | (22,564) | ​ | ​ | (22,380)
​ | ​ | $ | 936 | ​ | $ | 808
Schedule of intangible assets | The following tables summarize the components of intangible assets and related accumulated amortization balances at September 30, 2025 and March 31, 2025 (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | As of September 30, 2025
​ |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Intangible assets: | ​ | ​ | ​ |  | ​ | ​ |  | ​ | ​
Product designs | ​ | $ | 590 | ​ | $ | (590) | ​ | $ | —
Patents | ​ | ​ | 4,220 | ​ | ​ | (3,014) | ​ | ​ | 1,206
Software | ​ | ​ | 80 | ​ | ​ | (80) | ​ | ​ | —
Total | ​ | $ | 4,890 | ​ | $ | (3,684) | ​ | $ | 1,206
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | As of March 31, 2025
​ |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Intangible assets: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Product designs | ​ | $ | 590 | ​ | $ | (590) | ​ | $ | —
Patents | ​ | ​ | 4,220 | ​ | ​ | (2,897) | ​ | ​ | 1,323
Software | ​ | ​ | 80 | ​ | ​ | (80) | ​ | ​ | —
Total | ​ | $ | 4,890 | ​ | $ | (3,567) | ​ | $ | 1,323
​
Schedule of estimated future amortization expense of intangible assets | As of September 30, 2025, the estimated future amortization expense of intangible assets in the table above is as follows (in thousands): ​
​ | ​ | ​ | ​
Fiscal year ending March 31, | ​ | ​
2026 (remaining six months) | ​ | $ | 117
2027 | ​ | ​ | 233
2028 | ​ | ​ | 233
2029 | ​ | ​ | 233
2030 | ​ | ​ | 233
Thereafter | ​ | ​ | 157
Total | ​ | $ | 1,206
Schedule of accrued expenses and other liabilities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | September 30, 2025 | ​ | March 31, 2025
​ | ​ | (In thousands)
Accrued expenses and other liabilities: | ​ | ​ | ​ | ​ | ​ | ​
Accrued compensation | ​ | $ | 2,448 | ​ | $ | 2,488
Accrued commissions | ​ | ​ | 133 | ​ | ​ | 85
Production mask set | ​ | ​ | — | ​ | ​ | 1,250
Miscellaneous accrued expenses | ​ | ​ | 587 | ​ | ​ | 618
​ | ​ | $ | 3,168 | ​ | $ | 4,441

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