3. Balance Sheet Components

Inventories

Inventories as of May 31, 2017 and August 31, 2016 consisted of the following (in thousands):

	May 31,		August 31,
	2017		2016
Raw materials	$	926	$	1,400
Work in process		702		700
Finished goods		1,741		1,967
Total	$	3,369	$	4,067

Inventory write-downs to estimated net realizable values were $589 thousand and $1,119 thousand for the three and nine months ended May 31, 2017, respectively, and $641 thousand and $1,206 thousand for the three and nine months ended May 31, 2016, respectively.

Property, Plant and Equipment

Property, plant and equipment as of May 31, 2017 and August 31, 2016 consisted of the following (in thousands):

	May 31,			August 31,
	2017			2016
Buildings and improvements	$	13,916		$	12,822
Machinery and equipment		43,157			41,065
Leasehold improvements		239			213
Other equipment		2,317			2,198
Construction in progress		507			812
Total property, plant and equipment		60,136			57,110
Less: Accumulated depreciation and amortization		(51,578	)		(48,297	)
Property, plant and equipment, net	$	8,558		$	8,813

Intangible Assets

Intangible assets as of May 31, 2017 and August 31, 2016 consisted of the following (in thousands):

	May 31, 2017
	Weighted
	Average		Gross				Net
	Amortization		Carrying		Accumulated		Carrying
	Period (Years)		Amount		Amortization		Amount
Patents and trademarks		15	$	532	$	469	$	63
Acquired technology		5		505		505		—
Total			$	1,037	$	974	$	63

	August 31, 2016
	Weighted
	Average		Gross				Net
	Amortization		Carrying		Accumulated		Carrying
	Period (Years)		Amount		Amortization		Amount
Patents and trademarks		15	$	487	$	443	$	44
Acquired technology		5		479		479		—
Total			$	966	$	922	$	44