CONDENSED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended		95 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012
OPERATING ACTIVITIES
Net loss	$ (1,688)	$ (5,406)	$ (148,080)
Non cash items:
Deferred tax expense	0	0	770
Depreciation and amortization, net of gain on sale	(44)	63	3,898
Non-cash stock compensation	76	107	4,900
Gain on sale of bone device business	0	0	(2,298)
In-process research and development	0	0	34,311
Change in other operating items:
Interest, income taxes and other current assets	558	473	1,508
Accounts payable	4	139	(890)
Accrued liabilities	(30)	(136)	(3,005)
Cash flows used in operating activities	(1,124)	(4,760)	(108,886)
INVESTING ACTIVITIES
Expenditures for furniture and equipment, net	0	(19)	(1,044)
Proceeds from sale of assets	170	0	7,170
Cash paid for assets of AzERx/CBI	0	0	(4,058)
Cash paid for patent assignment rights	0	0	(650)
Purchases of investments	0	0	(282,538)
Maturities of investments	0	0	340,476
Cash flows (used in) provided by investing activities	170	(19)	59,356
FINANCING ACTIVITIES
Net proceeds from stock option exercises	0	0	4,612
Net proceeds from sale of stock	0	0	3,376
Common stock purchases	0	0	(1,041)
Cash flows provided by financing activities			6,947
NET DECREASE IN CASH AND CASH EQUIVALENTS	(954)	(4,779)	(42,583)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	13,778	24,387	55,407
CASH AND CASH EQUIVALENTS, END OF PERIOD	12,824	19,608	12,824
Supplemental Disclosure of Non-Cash Investing Activities - AzERx/CBI Acquisitions:
Current assets acquired			29
Patents acquired			2,142
Liabilities acquired, and accrued acquisition costs			(457)
Original investment reversal			(750)
In-process research and development acquired			34,311
Common stock issued for acquisition			(31,217)
Cash paid for acquisition	$ 0	$ 0	$ 4,058