Note 15 - Regulatory Capital Requirements: (Detail)	Jun. 30, 2012	Jun. 30, 2011
Tier One Leverage Capital to Average Assets	14.00%
California First National Bancorp [Member]
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets	6.00%
Capital Required for Capital Adequacy to Risk Weighted Assets	10.00%
Tier One Leverage Capital Required for Capital Adequacy to Average Assets	5.00%
Tier One Leverage Capital to Average Assets	40.70%	38.40%
California First National Bank [Member]
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets	4.00%
Capital Required for Capital Adequacy to Risk Weighted Assets	8.00%
Tier One Leverage Capital to Average Assets	22.40%	20.80%