CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 21,445	$ 46,168
Restricted cash	1,847	1,299
Short-term investments	62,840	29,985
Accounts receivable, net of allowances	3,214	2,113
Inventories	9,299	1,245
Prepaid expenses and other current assets	1,431	1,839
Total current assets	100,076	82,649
Fixed assets, net	29,966	25,103
Goodwill	7,992
Intangibles, net	4,233	5,259
Other assets	586	479
Total assets	142,853	113,490
Current liabilities:
Accounts payable	440	3,440
Accrued expenses	9,279	7,159
Current portion of royalty interest obligation	1,164	1,219
Current portion of deferred revenue	4,353	13,054
Current portion of long-term debt		7,039
Total current liabilities	15,236	31,911
Long-term debt	24,670	18,537
Royalty interest obligation	1,270	1,537
Deferred revenue	4,634	8,416
Contingent purchase liability		2,042
Other liabilities	2,538	2,778
Total liabilities	48,348	65,221
Commitments and contingencies
Stockholders' equity:
Preferred stock, par value $0.001; 5,000,000 shares authorized, none issued and outstanding
Common stock, par value $0.001 par value; 250,000,000 shares authorized, 32,420,472 shares issued and 32,419,407 shares outstanding at June 30, 2012; 25,340,103 shares issued and 25,339,038 shares outstanding at December 31, 2011	32	25
Additional paid-in capital	294,806	228,470
Accumulated deficit	(200,429)	(180,239)
Accumulated other comprehensive income	98	15
Treasury stock at cost, 1,065 shares	(2)	(2)
Total stockholders' equity	94,505	48,269
Total liabilities and stockholders' equity	$ 142,853	$ 113,490