Summary of Significant Accounting Policies (Summary of Geographic Information Relating to Sources, by Nation, of Partnership's Total Revenue and Long-Lived Assets) (Details) (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
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 704	$ 1,200	$ 1,527	$ 2,378
Percentage of total revenue			100.00%	100.00%
Long-lived assets	6,382		6,382		6,765
Percentage of long lived assets	100.00%		100.00%		100.00%
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues			1,367	2,218
Percentage of total revenue			90.00%	93.00%
Long-lived assets	6,142		6,142		6,525
Percentage of long lived assets	96.00%		96.00%		96.00%
Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues			160	160
Percentage of total revenue			10.00%	7.00%
Long-lived assets	240		240		240
Percentage of long lived assets	4.00%		4.00%		4.00%
Total International [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues			160	160
Percentage of total revenue			10.00%	7.00%
Long-lived assets	$ 240		$ 240		$ 240
Percentage of long lived assets	4.00%		4.00%		4.00%