Balance Sheet Components

12 Months Ended

Aug. 31, 2021

Disclosure Text Block Supplement [Abstract]

Balance Sheet Components

3. BALANCE SHEET COMPONENTS

Inventories

Inventories as of August 31, 2021 and 2020 consist of the following (in thousands):

	August 31,
	2021		2020
Raw materials	$	564	$	433
Work in process		1,217		792
Finished goods		2,156		1,251
Total	$	3,937	$	2,476

Inventory write‑downs to estimated net realizable values for the years ended August 31, 2021 and 2020 were $659 thousand and $709 thousand, respectively.

Property, Plant and Equipment

Property, plant and equipment as of August 31, 2021 and 2020 consist of the following (in thousands):

	August 31,
	2021			2020
Buildings and improvements	$	14,997		$	14,104
Machinery and equipment		34,421			33,977
Leasehold improvements		176			166
Other equipment		2,547			2,384
Construction in progress		—			7
Total property, plant and equipment		52,141			50,638
Less: Accumulated depreciation and amortization		(46,897	)		(44,993	)
Property, plant and equipment, net	$	5,244		$	5,645

Depreciation expense was $879 thousand and $831 thousand for the years ended August 31, 2021 and 2020, respectively.

Property, plant and equipment pledged as collateral for the Company’s notes payable were $3.5 million and $3.6 million as of August 31, 2021 and 2020, respectively.

Intangible Assets

Intangible assets as of August 31, 2021 and 2020consist of the following (in thousands):

	August 31, 2021
	Weighted
	Average	Gross				Net
	Amortization	Carrying		Accumulated		Carrying
	Period (Years)	Amount		Amortization		Amount
Patents and trademarks	15	$	627	$	501	$	126
Acquired technology	5		367		367		—
Total		$	994	$	868	$	126

	August 31, 2020
	Weighted
	Average	Gross				Net
	Amortization	Carrying		Accumulated		Carrying
	Period (Years)	Amount		Amortization		Amount
Patents and trademarks	15	$	550	$	461	$	89
Acquired technology	5		345		345		—
Total		$	895	$	806	$	89

Amortization expense was $18 thousand and $12 thousand for the years ended August 31, 2021 and 2020, respectively.

No impairment charge was recognized in the year ended August 31, 2021 and 2020. 

The estimated future amortization expense for the Company’s intangible assets as of August 31, 2021 is as follows (in thousands):

Accrued Expenses and Other Current Liabilities

Years Ending August 31,	Total
2022	$	11
2023		11
2024		10
2025		10
2026		10
Thereafter		74
Total	$	126

Accrued expenses and other current liabilities as of August 31, 2021 and 2020 consist of the following (in thousands):

	August 31,
	2021		2020
Accrued compensation and benefits	$	1,694	$	1,661
Customer deposits		293		148
Accrued business expenses		200		144
Accrued professional service fees		283		133
Advance receipts
Other (individually less than 5% of total accrued expenses and    other current liabilities)		313		568
Total	$	2,783	$	2,654