Balance Sheet Components (Tables)

6 Months Ended

Jun. 30, 2014

Schedule of Restricted Cash and Cash Equivalents [Table Text Block]

Restricted cash and investments consist of the following (See Note 8) (in thousands):

	June 30, 2014		December 31, 2013
Restricted in connection with notes payable	$	5,386	$	2,138
Restricted in connection with Comerica Bank term loan		21,000		—
Total restricted cash and investments	$	26,386	$	2,138
Reported as:
Restricted cash and investments	$	12,386	$	2,138
Restricted cash and investments, non-current		14,000		—
Total restricted cash and investments	$	26,386	$	2,138

Accounts Receivable, Net

Accounts receivable, net consists of the following (in thousands):

	June 30, 2014			December 31, 2013
Accounts receivable	$	73,496		$	57,010
Trade notes receivable		6,264			8,054
Allowance for doubtful accounts		(512	)		(531	)
Total	$	79,248		$	64,533

Inventories

Inventories consist of the following (in thousands):

	June 30, 2014		December 31, 2013
Raw materials	$	28,538	$	26,379
Work in process		14,305		14,341
Finished goods (1)		21,149		24,188
Total	$	63,992	$	64,908

Purchased Intangible Assets

Purchased intangible assets consist of the following (in thousands):

	June 30, 2014							December 31, 2013
	Gross Assets		Accumulated Amortization			Net Assets		Gross Assets		Accumulated Amortization			Net Assets
Technology and patents	$	34,290	$	(27,061	)	$	7,229	$	34,524	$	(25,931	)	$	8,593
Customer relationships		14,980		(10,351	)		4,629		15,004		(9,732	)		5,272
Leasehold interest		1,373		(275	)		1,098		1,406		(266	)		1,140
Non-compete agreements		950		(950	)		—		950		(950	)		—
	$	51,593	$	(38,637	)	$	12,956	$	51,884	$	(36,879	)	$	15,005

Amortization Expense of Purchased Intangible Assets

Amortization expense relating to technology and patents and the leasehold interest intangible assets is included within cost of goods sold, and customer relationships within operating expenses. The following table presents details of the amortization expense of the Company’s purchased intangible assets as reported in the condensed consolidated statements of operations (in thousands):

	Three Months EndedJune  30,				Six Months EndedJune 30,
	2014		2013		2014		2013
Cost of goods sold	$	714	$	772	$	1,428	$	1,200
Operating expenses		379		426		758		747
Total	$	1,093	$	1,198	$	2,186	$	1,947

Estimated Future Amortization Expense of Purchased Intangible Assets

The estimated future amortization expense of purchased intangible assets as of June 30, 2014, is as follows (in thousands):

2014 (remaining six months)	$	2,194
2015		4,445
2016		3,701
2017		823
2018		602
Thereafter		1,191
	$	12,956

Accrued Expenses and Other Current Liabilities

Accrued and other current liabilities consist of the following (in thousands):

	June 30, 2014		December 31, 2013
Employee-related accrued expenses	$	10,047	$	12,297
Other accrued expenses		7,864		11,346
Penalty payment derivative		425		—
	$	18,336	$	23,643

Summary of Movement in Warranty Accrual

The table below summarizes the movement in the warranty accrual, which is included in accrued and other current liabilities (in thousands):

	Three Months EndedJune  30,						Six Months EndedJune 30,
	2014			2013			2014			2013
Beginning balance	$	1,669		$	1,184		$	1,737		$	1,072
Warranty accruals		242			408			531			434
Settlements and adjustments		(100	)		(131	)		(457	)		(45	)
Ending balance	$	1,811		$	1,461		$	1,811		$	1,461

Other Noncurrent Liabilities

Other noncurrent liabilities consist of the following (in thousands):

	June 30, 2014		December 31, 2013
Pension and other employee-related accrued expenses	$	6,149	$	6,206
Penalty payment derivative		—		239
Other		1,972		1,542
	$	8,121	$	7,987