Real Estate and Accumulated Depreciation - Real Estate and Accumulated Depreciation (Details) (USD $)	Dec. 31, 2012
Acquisition Date
Chico, CA Date	1983-12
Fairfield, CA Date	1984-01
La Verne, CA Date	1984-08
Littleton, CO Date	1985-05
Riverside, CA Date	1984-06
Land
Chico, CA	209,700
Fairfield, CA	264,500
La Verne, CA	453,250
Littleton, CO	431,250
Riverside, CA	356,000
Total	1,714,700
Building and Improvements
Chico, CA	932,373
Fairfield, CA	1,267,896
La Verne, CA	1,243,974
Littleton, CO	1,423,811
Riverside, CA	1,391,210
Total	6,259,264
Costs Subsequent To Acquition
Chico, CA	12,419
Fairfield, CA	34,810
La Verne, CA	41,451
Littleton, CO	45,827
Riverside, CA	55,307
Total	189,814
Real Estate and Accumulated Depreciation, Carrying Amount of Land
Chico, CA	209,700
Fairfield, CA	264,500
La Verne, CA	453,250
Littleton, CO	431,250
Riverside, CA	356,000
Total	1,714,700
Buildings and Improvements
Chico, CA	944,792
Fairfield, CA	1,302,706
La Verne, CA	1,285,425
Littleton, CO	1,469,638
Riverside, CA	1,446,517
Total	6,449,078
Total
Chico, CA	1,154,492
Fairfield, CA	1,567,206
La Verne, CA	1,738,675
Littleton, CO	1,900,888
Riverside, CA	1,802,517
Total	8,163,778
Accumulated Depreciation
Chico, CA	(944,863)
Fairfield, CA	(1,292,618)
La Verne, CA	(1,283,639)
Littleton, CO	(1,466,815)
Riverside, CA	(1,435,577)
Total	(6,423,512)