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4. BALANCE SHEET DETAIL (Tables)

12 Months Ended

Mar. 31, 2021

BALANCE SHEET DETAIL

Schedule of inventories

		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

Schedule of accounts receivable, net

		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

Schedule of prepaid expenses and other current assets

		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

Schedule of property and equipment, net

		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

Schedule of intangible assets

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

Estimated future amortization expense of intangible assets

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

Schedule of accrued expenses and other liabilities

		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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