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
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 823	$ 1,178
Percentage of total revenue	100.00%	100.00%
Long-lived assets	6,561	6,765	6,765
Percentage of long lived assets	100.00%	100.00%
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	743	1,098
Percentage of total revenue	90.00%	93.00%
Long-lived assets	6,321	6,525
Percentage of long lived assets	96.00%	96.00%
Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	80	80
Percentage of total revenue	10.00%	7.00%
Long-lived assets	240	240
Percentage of long lived assets	4.00%	4.00%
Total International [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	80	80
Percentage of total revenue	10.00%	7.00%
Long-lived assets	$ 240	$ 240
Percentage of long lived assets	4.00%	4.00%