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4. BALANCE SHEET DETAIL | 12 Months Ended
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Mar. 31, 2021
BALANCE SHEET DETAIL |
NOTE 4 - BALANCE SHEET DETAIL | NOTE 4—BALANCE SHEET DETAIL
|  | March 31, |
|  | 2021 |  | 2020 |
|  | (In thousands) |
Inventories: |  |  |  |  |  |  |
Work-in-progress |  | $ | 1,561 |  | $ | 1,650 |
Finished goods |  |  | 2,764 |  |  | 2,612 |
Inventory at distributors |  |  | 18 |  |  | 20 |
|  | $ | 4,343 |  | $ | 4,282 |
|  | March 31, |
|  | 2021 |  | 2020 |
|  | (In thousands) |
Accounts receivable, net: |  |  |  |  |  |  |
Accounts receivable |  | $ | 3,785 |  | $ | 6,415 |
Less: Allowances for doubtful accounts and other |  |  | (120) |  |  | (85) |
|  | $ | 3,665 |  | $ | 6,330 |
|  | March 31, |
|  | 2021 |  | 2020 |
|  | (In thousands) |
Prepaid expenses and other current assets: |  |  |  |  |  |  |
Prepaid tooling and masks |  | $ | 584 |  | $ | 707 |
Prepaid income taxes |  |  | 1 |  |  | 79 |
Other receivables |  |  | 291 |  |  | 211 |
Other prepaid expenses and other current assets |  |  | 611 |  |  | 937 |
|  | $ | 1,487 |  | $ | 1,934 |
|  | March 31, |
|  | 2021 |  | 2020 |
|  | (In thousands) |
Property and equipment, net: |  |  |  |  |  |  |
Computer and other equipment |  | $ | 18,359 |  | $ | 18,191 |
Software |  |  | 4,097 |  |  | 4,086 |
Land |  |  | 3,900 |  |  | 3,900 |
Building and building improvements |  |  | 3,735 |  |  | 3,735 |
Furniture and fixtures |  |  | 102 |  |  | 102 |
Leasehold improvements |  |  | 877 |  |  | 874 |
|  |  | 31,070 |  |  | 30,888 |
Less: Accumulated depreciation |  |  | (23,742) |  |  | (22,769) |
|  | $ | 7,328 |  | $ | 8,119 |
Depreciation expense was $981,000, $1.2 million and $1.2 million for the years ended March 31, 2021, 2020 and 2019, respectively. The following table summarizes the components of intangible assets and related accumulated amortization balances at March 31, 2021 and 2020, respectively (in thousands):
|  | As of March 31, 2021 |
|  | Gross Carrying Amount |  | Accumulated amortization |  | Net Carrying Amount |
Intangible assets: |  |  |  |  |  |  |  |  |  |
Product designs |  | $ | 590 |  | $ | (590) |  | $ | — |
Patents |  |  | 4,220 |  |  | (1,964) |  |  | 2,256 |
Software |  |  | 80 |  |  | (80) |  |  | — |
Total |  | $ | 4,890 |  | $ | (2,634) |  | $ | 2,256 |
|  | As of March 31, 2020 |
|  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount |
Intangible assets: |  |  |  |  |  |  |  |  |  |
Product designs |  | $ | 590 |  | $ | (590) |  | $ | — |
Patents |  |  | 4,220 |  |  | (1,731) |  |  | 2,489 |
Software |  |  | 80 |  |  | (80) |  |  | — |
Total |  | $ | 4,890 |  | $ | (2,401) |  | $ | 2,489 |
Amortization of intangible assets of $233,000, $233,000 and $267,000 was included in cost of revenues for the years ended March 31, 2021, 2020 and 2019, respectively. As of March 31, 2021, the estimated future amortization expense of intangible assets in the table above is as follows (in thousands):
Fiscal year ending March 31, |  |  |
2022 |  | $ | 233
2023 |  |  | 233
2024 |  |  | 233
2025 |  |  | 233
2026 |  |  | 233
Thereafter |  |  | 1,091
Total |  | $ | 2,256
|  | March 31, |
|  | 2021 |  | 2020 |
|  | (In thousands) |
Accrued expenses and other liabilities: |  |  |  |  |  |  |
Accrued compensation |  | $ | 4,173 |  | $ | 3,673 |
Purchased intellectual property |  |  | — |  |  | 1,621 |
Accrued commissions |  |  | 217 |  |  | 270 |
Income taxes payable |  |  | 198 |  |  | 143 |
Miscellaneous accrued expenses |  |  | 932 |  |  | 871 |
|  | $ | 5,520 |  | $ | 6,578 |

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