Segment Data from Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Segment Reporting Information [Line Items]
Operating loss	$ (6,715)	$ (5,148)	$ (12,089)	$ (9,891)
Interest income	790	595	1,524	1,494
Equity loss	(18,400)	(8,947)	(25,387)	(16,395)
Net loss	(28,123)	(10,137)	(40,062)	(19,797)
Segment Assets	336,118		336,118		374,144
Healthcare
Segment Reporting Information [Line Items]
Equity loss	(14,850)	(8,820)	(20,750)	(15,159)
Net loss	(17,275)	(3,270)	(22,340)	(6,180)
Segment Assets	75,154		75,154		83,500
Technology
Segment Reporting Information [Line Items]
Equity loss	(3,399)	(56)	(4,500)	(1,045)
Net loss	(3,399)	(56)	(4,500)	(1,045)
Segment Assets	61,266		61,266		58,753
Penn Mezzanine
Segment Reporting Information [Line Items]
Operating loss	(4)	(2)	(9)	(4)
Interest income	380	277	724	848
Equity loss	(94)	(69)	(164)	(188)
Net loss	(13)	(533)	328	(83)
Segment Assets	13,186		13,186		12,153
Total Segments
Segment Reporting Information [Line Items]
Operating loss	(4)	(2)	(9)	(4)
Interest income	380	277	724	848
Equity loss	(18,343)	(8,945)	(25,414)	(16,392)
Net loss	(20,687)	(3,859)	(26,512)	(7,308)
Segment Assets	149,606		149,606		154,406
Other Items
Segment Reporting Information [Line Items]
Operating loss	(6,711)	(5,146)	(12,080)	(9,887)
Interest income	410	318	800	646
Equity loss	(57)	(2)	27	(3)
Net loss	(7,436)	(6,278)	(13,550)	(12,489)
Segment Assets	$ 186,512		$ 186,512		$ 219,738