3. Balance Sheet Components

Inventories

Inventories as of February 28, 2014 and August 31, 2013 consisted of the following (in thousands):

	February 28, 2014		August 31, 2013
Raw materials	$	2,216	$	2,193
Work in process	2,864		3,865
Finished goods	5,729		4,442
Total	$	10,809	$	10,500

Inventory write-downs to estimated net realizable values were $550 thousand and $737 thousand for the three and six months ended February 28, 2014, respectively, and $496 thousand and $1,208 thousand for the three and six months ended February 28, 2013, respectively.

Property, Plant and Equipment

Property, plant and equipment as of February 28, 2014 and August 31, 2013 consisted of the following (in thousands):

	February 28, 2014			August 31, 2013
Buildings and improvements	$	14,327		$	14,510
Machinery and equipment	66,727			67,109
Leasehold improvements	3,115			3,144
Other equipment	2,696			2,686
Construction in progress	1,699			1,028
Total property, plant and equipment	88,564			88,477
Less: Accumulated depreciation, amortization and impairment	(60,180		)	(58,004		)
Property, plant and equipment, net	$	28,384		$	30,473

Intangible Assets

Intangible assets as of February 28, 2014 and August 31, 2013 consisted of the following (in thousands):

	February 28, 2014
	Weighted Average Amortization Period (Years)	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Patents and trademarks	14	$	1,201	$	205	$	996
Acquired technology	5	710		225		485
Total		$	1,911	$	430	$	1,481

	August 31, 2013
	Weighted Average Amortization Period (Years)	Gross Carrying Amount		Accumulated Amortization and Impairment(1)		Net Carrying Amount
Patents and trademarks	15	$	973	$	161	$	812
Acquired technology	5	719		152		567
Customer relationships	5	1,337		1,337		—
Total		$	3,029	$	1,650	$	1,379

(1) Includes an impairment charge of $851 thousand recognized in the year ended August 31, 2013 to write down the intangible asset for customer relationships to its fair value of zero before the end of its estimated useful life.