Segment Data from Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Segment Reporting Information [Line Items]
Operating loss	$ (4,835)	$ (4,790)	$ (16,924)	$ (14,681)
Interest income	572	696	2,096	2,190
Equity income (loss)	(9,866)	(3,293)	(35,253)	(19,688)
Net income (loss)	(19,430)	(8,757)	(59,492)	(28,554)
Segment Assets	321,743		321,743		374,144
Total Segments
Segment Reporting Information [Line Items]
Operating loss	(4)	(2)	(13)	(6)
Interest income	394	322	1,118	1,170
Equity income (loss)	(10,135)	(3,291)	(35,549)	(19,683)
Net income (loss)	(13,970)	(2,880)	(40,482)	(10,188)
Segment Assets	149,829		149,829		154,406
Healthcare [Member]
Segment Reporting Information [Line Items]
Operating loss	0	0	0	0
Interest income	0	0	0	0
Equity income (loss)	(6,553)	(5,727)	(27,303)	(20,886)
Net income (loss)	(11,325)	(5,811)	(33,665)	(11,991)
Segment Assets	72,563		72,563		83,500
Technology [Member]
Segment Reporting Information [Line Items]
Operating loss	0	0	0	0
Interest income	0	0	0	0
Equity income (loss)	(3,490)	2,508	(7,990)	1,463
Net income (loss)	(3,490)	2,508	(7,990)	1,463
Segment Assets	64,393		64,393		58,753
Penn Mezzanine [Member]
Segment Reporting Information [Line Items]
Operating loss	(4)	(2)	(13)	(6)
Interest income	394	322	1,118	1,170
Equity income (loss)	(92)	(72)	(256)	(260)
Net income (loss)	845	423	1,173	340
Segment Assets	12,873		12,873		12,153
Other Items [Member]
Segment Reporting Information [Line Items]
Operating loss	(4,831)	(4,788)	(16,911)	(14,675)
Interest income	178	374	978	1,020
Equity income (loss)	269	(2)	296	(5)
Net income (loss)	(5,460)	(5,877)	(19,010)	(18,366)
Segment Assets	$ 171,914		$ 171,914		$ 219,738