Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 71,625	$ 76,088
Short-term investments	28,470	23,294
Restricted cash	2,813	2,660
Accounts receivable, net of allowance for doubtful accounts	95,677	83,161
Inventories	60,219	65,602
Prepaid expenses and other current assets	14,932	12,393
Total current assets	273,736	263,198
Property, plant and equipment, net	95,846	62,618
Purchased intangible assets, net	6,217	9,852
Goodwill	1,115	1,115
Other long-term assets	7,672	5,095
Total assets	384,586	341,878
Current liabilities:
Accounts payable	76,341	50,620
Notes payable and short-term borrowing	31,508	32,657
Current portion of long-term debt	908	760
Accrued and other current liabilities	28,184	27,950
Total current liabilities	136,941	111,987
Long-term debt, net of current portion	12,116	10,759
Other noncurrent liabilities	9,044	7,476
Total liabilities	158,101	130,222
Commitments and contingencies (Note 10)
Stockholders' equity:
Preferred stock, $0.0025 par value, 10,000 shares authorized, no shares issued or outstanding
Common stock, $0.0025 par value, 100,000 shares authorized At September 30, 2016, 42,315 shares issued and outstanding; at December 31, 2015, 40,986 shares issued and outstanding	106	102
Additional paid-in capital	528,451	511,750
Accumulated other comprehensive loss	(1,398)	(1,723)
Accumulated deficit	(300,674)	(298,473)
Total stockholders' equity	226,485	211,656
Total liabilities and stockholders' equity	$ 384,586	$ 341,878