Note 2 - Summary of Significant Accounting Policies (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Number of Operating Segments	1
Loans Receivable, Nonaccrual Status, Number of Days, Minimum	90 days
Allowance for Loan Losses, Number of Components	2
Qualify for Recognition as a Completed Sale, Expected Term	1 year
State Minimum Tax (in Dollars)	$ 800
Likelyhood of Being Realized on Examination	50.00%
Unrecognized Tax Benefits (in Dollars)	0	0
Unrecognized Tax Benefits that Would Impact Effective Tax Rate (in Dollars)	$ 0	$ 0
Single-family [Member] \| Minimum [Member]
Number of Units	1
Single-family [Member] \| Maximum [Member]
Number of Units	4
Vehicles, Equipment and Furniture Owned by DarkHorse Golf Club, LLC [Member] \| Minimum [Member]
Property, Plant and Equipment, Useful Life	5 years
Vehicles, Equipment and Furniture Owned by DarkHorse Golf Club, LLC [Member] \| Maximum [Member]
Property, Plant and Equipment, Useful Life	7 years
Real estate properties [Member] \| Minimum [Member]
Property, Plant and Equipment, Useful Life	5 years
Real estate properties [Member] \| Maximum [Member]
Property, Plant and Equipment, Useful Life	39 years

OWENS MORTGAGE INVESTMENT FUND A CALIF LTD PARTNERSHIP 10-K