Note 4 - Securities Available for Sale (Tables)

12 Months Ended

Dec. 31, 2015

Note 4 - Securities Available for Sale (Tables) [Line Items]

Available-for-sale Securities [Table Text Block]

(Dollars in thousands)	Amortized cost		Gross unrealized gains		Gross unrealized losses			Fair value
December 31, 2015
Mortgage-backed securities:
Federal Home Loan Mortgage Corporation (FHLMC)	$	728		31		0			759
Federal National Mortgage Association (FNMA)		725		22		0			747
Collateralized mortgage obligations:
FHLMC		742		2		(1	)		743
Other		42		0		(8	)		34
		2,237		55		(9	)		2,283
Other marketable securities:
U.S. Government agency obligations		105,003		68		(129	)		104,942
Municipal obligations		3,991		18		(7	)		4,002
Corporate obligations		340		0		(6	)		334
Corporate preferred stock		700		0		(350	)		350
Corporate equity		58		5		0			63
		110,092		91		(492	)		109,691
	$	112,329		146		(501	)		111,974
December 31, 2014
Mortgage-backed securities:
FHLMC	$	1,418		90		0			1,508
FNMA		1,337		64		0			1,401
		2,755		154		0			2,909
Other marketable securities:
U.S. Government agency obligations		135,014		31		(601	)		134,444
Corporate preferred stock		700		0		(280	)		420
Corporate equity		58		3		0			61
		135,772		34		(881	)		134,925
	$	138,527		188		(881	)		137,834

Contractual Obligation, Fiscal Year Maturity Schedule [Table Text Block]

	Payments Due by Period
(Dollars in thousands)	Total		Less than 1 Year		1-3 Years		4-5 Years		After 5 Years
Contractual Obligations:
Total borrowings	$	9,000		1,000		2,000		2,000		4,000
Annual rental commitments under non-cancellable operating leases		6,673		830		1,559		1,418		2,866
	$	15,673		1,830		3,559		3,418		6,866

Schedule of Unrealized Loss on Investments [Table Text Block]

	Less Than Twelve Months							Twelve Months or More							Total
(Dollars in thousands)	# of Investments		Fair Value		Unrealized Losses			# of Investments		Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
December 31, 2015
Collateralized mortgage obligations:
FNMA		1	$	346		(1	)		0	$	0		0		$	346		(1	)
Other		2		34		(8	)		0		0		0			34		(8	)
Other marketable securities:
U.S. Government agency obligations		9		44,878		(129	)		0		0		0			44,878		(129	)
Municipal obligations		12		2,010		(7	)		0		0		0			2,010		(7	)
Corporate obligations		1		334		(6	)		0		0		0			334		(6	)
Corporate preferred stock		0		0		0			1		350		(350	)		350		(350	)
Total temporarily impaired securities		25	$	47,602		(151	)		1	$	350		(350	)	$	47,952		(501	)
December 31, 2014
Other marketable securities:
U.S. Government agency obligations		22	$	104,453		(551	)		1	$	4,970		(50	)	$	109,423		(601	)
Corporate preferred stock		0		0		0			1		420		(280	)		420		(280	)
Total temporarily impaired securities		22	$	104,453		(551	)		2	$	5,390		(330	)	$	109,843		(881	)

Available-for-sale Securities [Member]

Note 4 - Securities Available for Sale (Tables) [Line Items]

Contractual Obligation, Fiscal Year Maturity Schedule [Table Text Block]

(Dollars in thousands)	Amortized Cost		Fair Value
Due one year or less	$	6,989		7,012
Due after one year through five years		103,190		103,162
Due after five years through ten years		1,333		1,329
Due after ten years		759		408
No stated maturity		58		63
Total	$	112,329		111,974