NOTE 17 - REGULATORY MATTERS (Detail) - (Table 1) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Total capital (to risk weighted assets) (in Dollars)	$ 112,938
Total capital (to risk weighted assets)	18.26%
Total capital (to risk weighted assets) (in Dollars)	49,480
Total capital (to risk weighted assets)	8.00%
Total capital (to risk weighted assets) (in Dollars)	61,850
Total capital (to risk weighted assets)	10.00%
Capital to Risk Weighted Assets [Member] | Company [Member]
Tier 1 capital (to risk weighted assets) (in Dollars)	105,211	107,240
Tier 1 capital (to risk weighted assets)	17.01%	17.99%
Tier 1 capital (to risk weighted assets) (in Dollars)	24,741	23,844
Tier 1 capital (to risk weighted assets)	4.00%	4.00%
Capital to Risk Weighted Assets [Member] | North Valley Bank [Member]
Tier 1 capital (to risk weighted assets) (in Dollars)		113,666
Tier 1 capital (to risk weighted assets)		19.06%
Tier 1 capital (to risk weighted assets) (in Dollars)		23,854
Tier 1 capital (to risk weighted assets)		4.00%
Tier 1 capital (to risk weighted assets) (in Dollars)		35,782
Tier 1 capital (to risk weighted assets)		6.00%
Capital to Risk Weighted Assets [Member]
Tier 1 capital (to risk weighted assets) (in Dollars)	105,122
Tier 1 capital (to risk weighted assets)	17.00%
Tier 1 capital (to risk weighted assets) (in Dollars)	24,735
Tier 1 capital (to risk weighted assets)	4.00%
Tier 1 capital (to risk weighted assets) (in Dollars)	37,102
Tier 1 capital (to risk weighted assets)	6.00%
Capital to Average Assets [Member] | Company [Member]
Tier 1 capital (to risk weighted assets) (in Dollars)	105,211	107,240
Tier 1 capital (to risk weighted assets)	11.77%	11.82%
Tier 1 capital (to risk weighted assets) (in Dollars)	35,756	36,291
Tier 1 capital (to risk weighted assets)	4.00%	4.00%
Capital to Average Assets [Member] | North Valley Bank [Member]
Tier 1 capital (to risk weighted assets) (in Dollars)		113,666
Tier 1 capital (to risk weighted assets)		12.54%
Tier 1 capital (to risk weighted assets) (in Dollars)		36,257
Tier 1 capital (to risk weighted assets)		4.00%
Tier 1 capital (to risk weighted assets) (in Dollars)		45,321
Tier 1 capital (to risk weighted assets)		5.00%
Capital to Average Assets [Member]
Tier 1 capital (to risk weighted assets) (in Dollars)	105,122
Tier 1 capital (to risk weighted assets)	11.76%
Tier 1 capital (to risk weighted assets) (in Dollars)	35,756
Tier 1 capital (to risk weighted assets)	4.00%
Tier 1 capital (to risk weighted assets) (in Dollars)	44,695
Tier 1 capital (to risk weighted assets)	5.00%
Company [Member]
Total capital (to risk weighted assets) (in Dollars)	113,028	116,464
Total capital (to risk weighted assets)	18.28%	19.53%
Total capital (to risk weighted assets) (in Dollars)	49,465	47,707
Total capital (to risk weighted assets)	8.00%	8.00%
North Valley Bank [Member]
Total capital (to risk weighted assets) (in Dollars)		121,221
Total capital (to risk weighted assets)		20.33%
Total capital (to risk weighted assets) (in Dollars)		47,701
Total capital (to risk weighted assets)		8.00%
Total capital (to risk weighted assets) (in Dollars)		$ 59,627
Total capital (to risk weighted assets)		10.00%