Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 102,525	$ 102,946
Short-term investments	70,354	75,535
Accounts receivable, net	36,566	38,041
Inventories	52,356	54,046
Prepaid expenses and other current assets	7,259	5,975
Total current assets	269,060	276,543
Property, plant and equipment, net	17,020	19,036
Goodwill	61,223	61,390
In-process research and development	32,850	32,850
Other intangible assets, net	17,785	17,807
Deferred financing costs, net	1,441	1,552
Long-term investments and other assets	14,341	14,635
Total assets	413,720	423,813
Current liabilities:
Accounts payable	10,674	13,322
Other accrued liabilities	33,671	36,589
Total current liabilities	44,345	49,911
Convertible senior notes, net	116,871	114,803
Contingent liabilities - See Note 4	45,840	43,740
Other long-term liabilities	6,698	6,825
Commitments and contingencies - See Note 12
Stockholders' equity:
Preferred stock - $.001 par value; 5,000 shares authorized; no shares issued and outstanding at March 31, 2015 and December 31, 2014
Common stock - $.001 par value; 25,000 shares authorized; 17,245 and 17,156 shares issued and outstanding at March 31, 2015 and December 31, 2014, respectively	17	17
Additional paid-in capital	571,616	565,609
Accumulated deficit	(363,254)	(348,719)
Accumulated other comprehensive loss:
Cumulative translation adjustments	(8,272)	(8,112)
Unrealized loss on investments	(141)	(261)
Total accumulated other comprehensive loss	(8,413)	(8,373)
Total stockholders' equity	199,966	208,534
Total liabilities and stockholders' equity	$ 413,720	$ 423,813