CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (11,385)	$ (21,543)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	16,521	20,427
Amortization of inventory step-up in fair value	4,666	9,084
Share-based compensation	6,272	3,110
Deferred tax, net	(570)	0
Available-for-sale Securities, Gross Realized Gain (Loss), Excluding Other than Temporary Impairments	(1,240)	(50)
Other non-cash transactions	356	529
Changes in operating assets and liabilities:
Accounts receivable, net	1,339	6,253
Inventories	(1,207)	(1,128)
Prepaid expenses and other assets	1,883	1,704
Accounts payable and accrued liabilities	(2,599)	(5,796)
Deferred revenue	(6,136)	10,783
Other long-term liabilities	(266)	(1,661)
Net cash provided by operating activities	7,634	21,712
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from sales of available-for-sale securities	2,162	9,364
Proceeds on sale of fixed assets	106	0
Capital expenditures	(3,036)	(2,271)
Purchase of non-marketable investment	0	(200)
Purchase of technology rights	0	(440)
Net cash (used in) provided by investing activities	(768)	6,453
CASH FLOWS FROM FINANCING ACTIVITIES:
Issuance of common stock, net	1,978	521
Repayments of long term debt	(14,500)	(6,376)
Bond and loan issuance costs	0	(228)
Repurchase of 3.50% senior convertible notes	0	(3,855)
Net cash used in financing activities	(12,522)	(9,938)
Effect of exchange rate changes on cash and cash equivalents	28	(224)
Net increase in cash and cash equivalents	(5,628)	18,003
Cash and cash equivalents at beginning of period	57,128	25,671
Cash and cash equivalents at end of period	$ 51,500	$ 43,674