3. Balance Sheet Components

Inventories

Inventories as of November 30, 2017 and August 31, 2017 consisted of the following (in thousands):

	November 30,		August 31,
	2017		2017
Raw materials	$	907	$	885
Work in process		595		758
Finished goods		1,112		1,303
Total	$	2,614	$	2,946

Inventory write-downs to estimated net realizable values were $206 thousand and $196 thousand for the three months ended November 30, 2017 and 2016, respectively.

Property, Plant and Equipment

Property, plant and equipment as of November 30, 2017 and August 31, 2017 consisted of the following (in thousands):

	November 30,			August 31,
	2017			2017
Buildings and improvements	$	13,979		$	13,891
Machinery and equipment		42,845			42,562
Leasehold improvements		240			238
Other equipment		2,324			2,311
Construction in progress		304			321
Total property, plant and equipment		59,692			59,323
Less: Accumulated depreciation and amortization		(51,593	)		(51,048	)
Property, plant and equipment, net	$	8,099		$	8,275

Intangible Assets

Intangible assets as of November 30, 2017 and August 31, 2017 consisted of the following (in thousands):

	November 30, 2017
	Weighted
	Average		Gross				Net
	Amortization		Carrying		Accumulated		Carrying
	Period (Years)		Amount		Amortization		Amount
Patents and trademarks		15	$	556	$	447	$	109
Acquired technology		5		506		506		—
Total			$	1,062	$	953	$	109

	August 31, 2017
	Weighted
	Average		Gross				Net
	Amortization		Carrying		Accumulated		Carrying
	Period (Years)		Amount		Amortization		Amount
Patents and trademarks		15	$	574	$	470	$	104
Acquired technology		5		503		503		—
Total			$	1,077	$	973	$	104

The Company sold 4 patents on October 25, 2017 for a total of $500 thousand.