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		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 1,086	$ 1,464	$ 4,895	$ 4,335
Percentage of total revenue			100.00%	100.00%
Financing lease receivable	5,927		5,927		6,959
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			4,821	4,210
Percentage of total revenue			98.00%	97.00%
Financing lease receivable	5,903		5,903		6,935
Percentage of long lived assets	100.00%		100.00%		100.00%
Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues			74	125
Percentage of total revenue			2.00%	3.00%
Financing lease receivable	24		24		24
Percentage of long lived assets	0.00%		0.00%		0.00%
Total International [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues			74	125
Percentage of total revenue			2.00%	3.00%
Financing lease receivable	$ 24		$ 24		$ 24
Percentage of long lived assets	0.00%		0.00%		0.00%