Note 6 - Allowance for Loan and Lease Losses (Detail) - Allowance for Loan and Lease Losses by Loan Category: (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Collectively evaluated:
Balance	$ 7,860	$ 15,194
Charge-Offs	(63)	(3,821)
Recoveries	370	1,183
Provisions	400	1,840
Balance	8,567	14,396
Total Loans	437,518	526,800
Residential Real Estate Loans Collectively Evaluated [Member]
Collectively evaluated:
Balance	1,178	2,004
Charge-Offs		(177)
Provisions	181	(530)
Balance	1,359	1,297
Total Loans	71,583	82,170
Residential Construction Collectively Evaluated [Member]
Collectively evaluated:
Balance	45
Provisions	(10)
Balance	35
Total Loans	2,215
Residential Lots and Raw Land Collectively Evaluated [Member]
Collectively evaluated:
Balance	14
Provisions	1
Balance	15
Total Loans	929
Commercial real estate collectively evaluated [Member]
Collectively evaluated:
Balance	3,342	8,117
Charge-Offs		(66)
Recoveries	3	18
Provisions	430	(1,177)
Balance	3,775	6,892
Total Loans	186,822	263,540
Commercial construction collectively evaluated [Member]
Collectively evaluated:
Balance	350	633
Recoveries		1
Provisions	9	(96)
Balance	359	538
Total Loans	21,831	14,304
Commercial Lots and Raw Land Collectively Evaluation [Member]
Collectively evaluated:
Balance	504
Provisions	(32)
Balance	472
Total Loans	25,862
Commercial and Industrial Collectively Evaluated [Member]
Collectively evaluated:
Balance	353
Charge-Offs	(12)
Recoveries	1
Provisions	24
Balance	366
Total Loans	21,667
Lease receivables collectively evaluated [Member]
Collectively evaluated:
Balance	136	223
Provisions	6	46
Balance	142	269
Total Loans	5,924	7,662
Consumer real estate collectively evaluated [Member]
Collectively evaluated:
Balance	342	1,132
Charge-Offs	(27)
Recoveries	5	4
Provisions	11	592
Balance	331	1,728
Total Loans	18,888	38,378
Consumer Construction Collectively Evaluated [Member]
Collectively evaluated:
Balance	11
Provisions	4
Balance	15
Total Loans	943
Consumer Lots and Raw Land Collectively Evaluated [Member]
Collectively evaluated:
Balance	547
Provisions	(253)
Balance	294
Total Loans	15,878
Home equity lines of credit collectively evaluated [Member]
Collectively evaluated:
Balance	490	887
Charge-Offs	(11)
Recoveries		1
Provisions	17	466
Balance	496	1,354
Total Loans	26,033	28,828
Consumer Other Collectively Evaluated [Member]
Collectively evaluated:
Balance	88
Charge-Offs	(5)
Recoveries	5
Provisions	(2)
Balance	86
Total Loans	4,208
Total collectively evaluated [Member]
Collectively evaluated:
Balance	7,400	13,583
Charge-Offs	(55)	(270)
Recoveries	14	35
Provisions	386	(676)
Balance	7,745	12,672
Total Loans	402,783	451,893
Commercial real estate individually evaluated [Member]
Collectively evaluated:
Balance	35	1,160
Charge-Offs	(7)	(2,534)
Recoveries	354	1,010
Provisions	38	1,412
Balance	420	1,048
Total Loans	25,144	66,744
Commercial construction individually evaluated [Member]
Collectively evaluated:
Recoveries		100
Provisions		(100)
Total Loans	731	3,142
Commercial Lots and Raw Land Individually Evaluated [Member]
Collectively evaluated:
Balance	303
Provisions	(91)
Balance	212
Total Loans	6,967
Commercial and Industrial Individually Evaluated [Member]
Collectively evaluated:
Total Loans	126
Consumer real estate individually evaluated [Member]
Collectively evaluated:
Balance	12	450
Charge-Offs		(247)
Recoveries	2
Provisions	(13)	281
Balance	1	484
Total Loans	532	2,787
Consumer Lots and Raw Land Individually Evaluated [Member]
Collectively evaluated:
Balance	110
Provisions	69
Balance	179
Total Loans	1,070
Home equity lines of credit individually evaluated [Member]
Collectively evaluated:
Charge-Offs	(1)	(163)
Provisions	1	162
Balance		1
Total Loans	36	376
Consumer Other Individually Evaluated [Member]
Collectively evaluated:
Provisions	10
Balance	10
Total Loans	129
Commercial non-real estate collectively evaluated [Member]
Collectively evaluated:
Balance		371
Charge-Offs		(24)
Provisions		(32)
Balance		315
Total Loans		9,834
Commercial unsecured collectively evaluated [Member]
Collectively evaluated:
Balance		75
Charge-Offs		(1)
Recoveries		2
Provisions		(12)
Balance		64
Total Loans		2,465
Consumer non-real estate collectively evaluated [Member]
Collectively evaluated:
Balance		73
Recoveries		8
Provisions		30
Balance		111
Total Loans		2,313
Consumer unsecured collectively evaluated [Member]
Collectively evaluated:
Balance		68
Charge-Offs		(2)
Recoveries		1
Provisions		37
Balance		104
Total Loans		2,399
Commercial non-real estate individually evaluated [Member]
Collectively evaluated:
Charge-Offs		(607)
Recoveries		20
Provisions		587
Total Loans		1,422
Commercial unsecured individually evaluated [Member]
Collectively evaluated:
Recoveries		15
Provisions		(3)
Balance		12
Total Loans		285
Consumer non-real estate individually evaluated [Member]
Collectively evaluated:
Recoveries		3
Provisions		(2)
Total Loans		28
Consumer unsecured individually evaluated [Member]
Collectively evaluated:
Balance		1
Provisions		179
Balance		179
Total Loans		123
Total individually evaluated [Member]
Collectively evaluated:
Balance		1,611
Charge-Offs		(3,551)
Recoveries		1,148
Provisions		2,516
Balance		1,724
Total Loans		74,907
Total individually evaluated [Member]
Collectively evaluated:
Balance	460
Charge-Offs	(8)
Recoveries	356
Provisions	14
Balance	822
Total Loans	$ 34,735