Quarterly Results (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2012

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information [Table Text Block]

Presented below is a summary of the unaudited quarterly financial information for the years ended December 31, 2012, 2011 and 2010:

	Quarters Ended
	March 31, 2012			June 30, 2012			September 30, 2012			December 31, 2012
Total revenues (in thousands)	$	2,725		$	3,632		$	4,120		$	4,945
Net loss attributable to stockholders (in thousands)	$	(619	)	$	(1,148	)	$	(1,270	)	$	(3,302	)
Weighted average shares outstanding	7,490,591			10,497,092			13,508,525			17,184,855
Basic and diluted net loss per share attributable to stockholders	$	(0.08	)	$	(0.11	)	$	(0.09	)	$	(0.19	)

	Quarters Ended
	March 31, 2011			June 30, 2011			September 30, 2011			December 31, 2011
Total revenues (in thousands)	$	1,690		$	1,723		$	1,787		$	2,335
Net loss attributable to stockholders (in thousands)	$	(341	)	$	(810	)	$	(205	)	$	(2,063	)
Weighted average shares outstanding	543,324			1,273,624			2,198,529			4,223,407
Basic and diluted net loss per share attributable to stockholders	$	(1.27	)	$	(0.91	)	$	(0.26	)	$	(0.56	)

	Quarters Ended
	March 31, 2010		June 30, 2010			September 30, 2010			December 31, 2010
Total revenues (in thousands)	$	—	$	96		$	1,031		$	1,250
Net loss attributable to stockholders (in thousands)	$	—	$	(62	)	$	(93	)	$	(1,607	)
Weighted average shares outstanding	20,000		20,000			29,000			83,907
Basic and diluted net loss per share attributable to stockholders	NM		NM			NM			$	(23.41	)