Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 62,739	$ 76,088
Short-term investments	38,364	23,294
Restricted cash	2,659	2,660
Accounts receivable, net of allowance for doubtful accounts	87,174	83,161
Inventories	62,525	65,602
Prepaid expenses and other current assets	15,035	12,393
Total current assets	268,496	263,198
Property, plant and equipment, net	66,078	62,618
Purchased intangible assets, net	8,699	9,852
Goodwill	1,115	1,115
Other long-term assets	4,895	5,095
Total assets	349,283	341,878
Current liabilities:
Accounts payable	55,104	50,620
Notes payable and short-term borrowing	32,650	32,657
Current portion of long-term debt	815	760
Accrued and other current liabilities	21,356	27,950
Total current liabilities	109,925	111,987
Long-term debt, net of current portion	11,318	10,759
Other noncurrent liabilities	7,953	7,476
Total liabilities	$ 129,196	$ 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 March 31, 2016, 41,340 shares issued and outstanding; at December 31, 2015, 40,986 shares issued and outstanding	$ 103	$ 102
Additional paid-in capital	515,777	511,750
Accumulated other comprehensive income (loss)	370	(1,723)
Accumulated deficit	(296,163)	(298,473)
Total stockholders' equity	220,087	211,656
Total liabilities and stockholders' equity	$ 349,283	$ 341,878