Summary of Unaudited Quarterly Financial Information (Tables)

12 Months Ended

Dec. 31, 2013

Quarterly Financial Information Disclosure [Abstract]

Summary of Company's Unaudited Quarterly Results of Operations

The following is a summary of the Company’s (unaudited) quarterly results of operations for the years ended December 31 (in thousands, except per share amounts):

2013:	March 31,			June 30,			Sept. 30,			Dec. 31,
Total revenues	$	1,574		$	1,456		$	1,543		$	3,145
Total operating expenses		10,881			11,299			11,523			5,367
Net loss		(9,282	)		(9,881	)		(9,883	)		(2,192	)
Basic and diluted net loss per share (1)		(0.11	)		(0.11	)		(0.11	)		(0.03	)
2012:	March 31,			June 30,			Sept. 30,			Dec. 31,
Total revenues	$	11,460		$	1,565		$	2,175		$	2,319
Total operating expenses		11,600			9,502			9,955			9,895
Net income (loss)		244			(7,868	)		(7,726	)		(7,549	)
Basic and diluted net loss per share (1)		(0.00	)		(0.09	)		(0.09	)		(0.09	)

(1) Net income (loss) per share is computed independently for each quarter and the full year based upon respective shares outstanding. Therefore, the sum of the quarterly loss per share amounts may not equal the annual amounts reported.