Note 2 - Securities (Details) - The Amortized Cost And Approximate Fair Value Of Securities Is As Follows: (USD $)	9 Months Ended				9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended					9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended																																													12 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended							9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended							9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended							9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended							9 Months Ended	12 Months Ended		9 Months Ended	12 Months Ended					9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended							9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended						12 Months Ended						9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013 US States and Political Subdivisions Debt Securities [Member] Amortized Cost [Member]	Dec. 31, 2012 US States and Political Subdivisions Debt Securities [Member] Amortized Cost [Member]	Sep. 30, 2013 US States and Political Subdivisions Debt Securities [Member] Unrealized Gains [Member]	Dec. 31, 2012 US States and Political Subdivisions Debt Securities [Member] Unrealized Gains [Member]	Sep. 30, 2013 US States and Political Subdivisions Debt Securities [Member] Unrealized Losses [Member]	Dec. 31, 2012 US States and Political Subdivisions Debt Securities [Member] Unrealized Losses [Member]	Sep. 30, 2013 US States and Political Subdivisions Debt Securities [Member] OTTI [Member]	Dec. 31, 2012 US States and Political Subdivisions Debt Securities [Member] OTTI [Member]	Sep. 30, 2013 US States and Political Subdivisions Debt Securities [Member] Fair Value [Member]	Dec. 31, 2012 US States and Political Subdivisions Debt Securities [Member] Fair Value [Member]	Sep. 30, 2013 Held To Maturity [Member] Amortized Cost [Member]	Dec. 31, 2012 Held To Maturity [Member] Amortized Cost [Member]	Sep. 30, 2013 Held To Maturity [Member] Unrealized Gains [Member]	Dec. 31, 2012 Held To Maturity [Member] Unrealized Gains [Member]	Sep. 30, 2013 Held To Maturity [Member] Unrealized Losses [Member]	Dec. 31, 2012 Held To Maturity [Member] Unrealized Losses [Member]	Sep. 30, 2013 Held To Maturity [Member] OTTI [Member]	Dec. 31, 2012 Held To Maturity [Member] OTTI [Member]	Sep. 30, 2013 Held To Maturity [Member] Fair Value [Member]	Dec. 31, 2012 Held To Maturity [Member] Fair Value [Member]	Sep. 30, 2013 Federal Reserve Bank Stock [Member] Amortized Cost [Member]		Dec. 31, 2012 Federal Reserve Bank Stock [Member] Amortized Cost [Member]		Sep. 30, 2013 Federal Reserve Bank Stock [Member] Unrealized Gains [Member]		Dec. 31, 2012 Federal Reserve Bank Stock [Member] Unrealized Gains [Member]		Sep. 30, 2013 Federal Reserve Bank Stock [Member] Unrealized Losses [Member]		Dec. 31, 2012 Federal Reserve Bank Stock [Member] Unrealized Losses [Member]		Dec. 31, 2012 Federal Reserve Bank Stock [Member] OTTI [Member]		Dec. 31, 2011 Federal Reserve Bank Stock [Member] OTTI [Member]		Sep. 30, 2013 Federal Reserve Bank Stock [Member] Fair Value [Member]		Dec. 31, 2012 Federal Reserve Bank Stock [Member] Fair Value [Member]		Sep. 30, 2013 Subsidiary Trust [Member] Amortized Cost [Member]		Dec. 31, 2012 Subsidiary Trust [Member] Amortized Cost [Member]		Sep. 30, 2013 Subsidiary Trust [Member] Unrealized Gains [Member]		Dec. 31, 2012 Subsidiary Trust [Member] Unrealized Gains [Member]		Sep. 30, 2013 Subsidiary Trust [Member] Unrealized Losses [Member]		Dec. 31, 2012 Subsidiary Trust [Member] Unrealized Losses [Member]		Dec. 31, 2012 Subsidiary Trust [Member] OTTI [Member]		Dec. 31, 2011 Subsidiary Trust [Member] OTTI [Member]		Sep. 30, 2013 Subsidiary Trust [Member] Fair Value [Member]		Dec. 31, 2012 Subsidiary Trust [Member] Fair Value [Member]		Sep. 30, 2013 US Government Agencies Debt Securities [Member] Amortized Cost [Member]	Dec. 31, 2012 US Government Agencies Debt Securities [Member] Amortized Cost [Member]	Dec. 31, 2012 US Government Agencies Debt Securities [Member] Unrealized Gains [Member]	Sep. 30, 2013 US Government Agencies Debt Securities [Member] Unrealized Losses [Member]	Dec. 31, 2012 US Government Agencies Debt Securities [Member] Unrealized Losses [Member]	Sep. 30, 2013 US Government Agencies Debt Securities [Member] OTTI [Member]	Dec. 31, 2012 US Government Agencies Debt Securities [Member] OTTI [Member]	Sep. 30, 2013 US Government Agencies Debt Securities [Member] Fair Value [Member]	Dec. 31, 2012 US Government Agencies Debt Securities [Member] Fair Value [Member]	Sep. 30, 2013 US Government Agencies Debt Securities [Member]	Dec. 31, 2012 US Government Agencies Debt Securities [Member]	Sep. 30, 2013 US States and Political Subdivisions Debt Securities [Member] Amortized Cost [Member]	Dec. 31, 2012 US States and Political Subdivisions Debt Securities [Member] Amortized Cost [Member]	Sep. 30, 2013 US States and Political Subdivisions Debt Securities [Member] Unrealized Gains [Member]	Dec. 31, 2012 US States and Political Subdivisions Debt Securities [Member] Unrealized Gains [Member]	Sep. 30, 2013 US States and Political Subdivisions Debt Securities [Member] Unrealized Losses [Member]	Dec. 31, 2012 US States and Political Subdivisions Debt Securities [Member] Unrealized Losses [Member]	Sep. 30, 2013 US States and Political Subdivisions Debt Securities [Member] OTTI [Member]	Dec. 31, 2012 US States and Political Subdivisions Debt Securities [Member] OTTI [Member]	Sep. 30, 2013 US States and Political Subdivisions Debt Securities [Member] Fair Value [Member]	Dec. 31, 2012 US States and Political Subdivisions Debt Securities [Member] Fair Value [Member]	Sep. 30, 2013 US States and Political Subdivisions Debt Securities [Member]	Dec. 31, 2012 US States and Political Subdivisions Debt Securities [Member]	Sep. 30, 2013 Corporate Debt Securities [Member] Amortized Cost [Member]	Dec. 31, 2012 Corporate Debt Securities [Member] Amortized Cost [Member]	Sep. 30, 2013 Corporate Debt Securities [Member] Unrealized Gains [Member]	Dec. 31, 2012 Corporate Debt Securities [Member] Unrealized Gains [Member]	Sep. 30, 2013 Corporate Debt Securities [Member] Unrealized Losses [Member]	Dec. 31, 2012 Corporate Debt Securities [Member] Unrealized Losses [Member]	Sep. 30, 2013 Corporate Debt Securities [Member] OTTI [Member]	Dec. 31, 2012 Corporate Debt Securities [Member] OTTI [Member]	Sep. 30, 2013 Corporate Debt Securities [Member] Fair Value [Member]	Dec. 31, 2012 Corporate Debt Securities [Member] Fair Value [Member]	Sep. 30, 2013 Corporate Debt Securities [Member]	Dec. 31, 2012 Corporate Debt Securities [Member]	Sep. 30, 2013 Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] Amortized Cost [Member]	Dec. 31, 2012 Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] Amortized Cost [Member]	Sep. 30, 2013 Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] Unrealized Gains [Member]	Dec. 31, 2012 Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] Unrealized Gains [Member]	Sep. 30, 2013 Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] Unrealized Losses [Member]	Dec. 31, 2012 Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] Unrealized Losses [Member]	Sep. 30, 2013 Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] OTTI [Member]	Dec. 31, 2012 Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] OTTI [Member]	Sep. 30, 2013 Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] Fair Value [Member]	Dec. 31, 2012 Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] Fair Value [Member]	Sep. 30, 2013 Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]	Dec. 31, 2012 Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]	Sep. 30, 2013 Residential Mortgage Backed Securities [Member] Amortized Cost [Member]	Dec. 31, 2012 Residential Mortgage Backed Securities [Member] Amortized Cost [Member]	Sep. 30, 2013 Residential Mortgage Backed Securities [Member] Unrealized Gains [Member]	Dec. 31, 2012 Residential Mortgage Backed Securities [Member] Unrealized Gains [Member]	Dec. 31, 2012 Residential Mortgage Backed Securities [Member] Unrealized Losses [Member]	Sep. 30, 2013 Residential Mortgage Backed Securities [Member] OTTI [Member]	Dec. 31, 2012 Residential Mortgage Backed Securities [Member] OTTI [Member]	Sep. 30, 2013 Residential Mortgage Backed Securities [Member] Fair Value [Member]	Dec. 31, 2012 Residential Mortgage Backed Securities [Member] Fair Value [Member]	Sep. 30, 2013 Asset-backed Securities [Member] Amortized Cost [Member]	Dec. 31, 2012 Asset-backed Securities [Member] Amortized Cost [Member]	Sep. 30, 2013 Asset-backed Securities [Member] Unrealized Gains [Member]	Dec. 31, 2012 Asset-backed Securities [Member] Unrealized Gains [Member]	Sep. 30, 2013 Asset-backed Securities [Member] Unrealized Losses [Member]	Dec. 31, 2012 Asset-backed Securities [Member] Unrealized Losses [Member]	Sep. 30, 2013 Asset-backed Securities [Member] OTTI [Member]	Dec. 31, 2012 Asset-backed Securities [Member] OTTI [Member]	Sep. 30, 2013 Asset-backed Securities [Member] Fair Value [Member]	Dec. 31, 2012 Asset-backed Securities [Member] Fair Value [Member]	Sep. 30, 2013 Asset-backed Securities [Member]	Dec. 31, 2012 Asset-backed Securities [Member]	Sep. 30, 2013 CRA Funds [Member] Amortized Cost [Member]	Dec. 31, 2012 CRA Funds [Member] Amortized Cost [Member]	Sep. 30, 2013 CRA Funds [Member] Unrealized Gains [Member]	Dec. 31, 2012 CRA Funds [Member] Unrealized Gains [Member]	Sep. 30, 2013 CRA Funds [Member] Unrealized Losses [Member]	Dec. 31, 2012 CRA Funds [Member] Unrealized Losses [Member]	Sep. 30, 2013 CRA Funds [Member] OTTI [Member]	Dec. 31, 2012 CRA Funds [Member] OTTI [Member]	Sep. 30, 2013 CRA Funds [Member] Fair Value [Member]	Dec. 31, 2012 CRA Funds [Member] Fair Value [Member]	Sep. 30, 2013 CRA Funds [Member]	Dec. 31, 2012 CRA Funds [Member]	Dec. 31, 2012 Available-for-sale Securities [Member] Amortized Cost [Member]	Dec. 31, 2012 Available-for-sale Securities [Member] Unrealized Gains [Member]	Dec. 31, 2012 Available-for-sale Securities [Member] Unrealized Losses [Member]	Dec. 31, 2012 Available-for-sale Securities [Member] OTTI [Member]	Dec. 31, 2012 Available-for-sale Securities [Member] Fair Value [Member]	Sep. 30, 2013 Amortized Cost [Member]	Dec. 31, 2012 Amortized Cost [Member]	Sep. 30, 2013 Unrealized Gains [Member]	Sep. 30, 2013 Unrealized Losses [Member]	Sep. 30, 2013 OTTI [Member]	Dec. 31, 2011 OTTI [Member]	Sep. 30, 2013 Fair Value [Member]	Dec. 31, 2012 Fair Value [Member]
Note 2 - Securities (Details) - The Amortized Cost And Approximate Fair Value Of Securities Is As Follows: [Line Items]
Amortized Cost																																																															$ 86,395,000	$ 70,892,000										$ 17,899,000	$ 12,810,000											$ 6,063,000	$ 6,080,000											$ 63,874,000	$ 56,572,000											$ 588,000	$ 718,000								$ 152,000	$ 187,000											$ 14,352,000	$ 14,128,000											$ 161,387,000					$ 189,323,000
Unrealized Gains																																																																	362,000											156,000	579,000											216,000	270,000											782,000	1,369,000											379,000	330,000								143,000	129,000											0	233,000										3,272,000						1,676,000
Unrealized Losses																																																																		(4,649,000)	(73,000)											(912,000)	0											0	0											(929,000)	0											0									0	0											(401,000)	0									(73,000)						(6,891,000)
OTTI	451,000																																																																			0	0											0	0											0	0											0	0										(299,000)	(365,000)									(152,000)	(173,000)											0	0								(538,000)						(451,000)
Fair Value	183,657,000	164,048,000																																																																				81,746,000	71,181,000	81,746,000	71,181,000									17,143,000	13,389,000	17,143,000	13,389,000									6,279,000	6,350,000	6,279,000	6,350,000									63,727,000	57,941,000	63,727,000	57,941,000								668,000	683,000									143,000	143,000	143,000	143,000									13,951,000	14,361,000	13,951,000	14,361,000					164,048,000							183,657,000
Amortized Cost			7,788,000	4,046,000									7,788,000	4,046,000
Unrealized Gains					372,000	711,000									372,000	711,000
Fair Value	8,108,000	4,757,000									8,108,000	4,757,000									8,108,000	4,757,000
Unrealized Losses							(52,000)	0									(52,000)	0
OTTI									0	0									0	0
Amortized Cost	5,702,000																						4,619,000	[1],[2]	4,509,000	[1],[2]	0	[1],[2]	0	[1],[2]	0	[1],[2]	0	[1],[2]	0	[1],[2]	0	[1],[2]	4,619,000	[1],[2]	4,509,000	[1],[2]	1,083,000	[3]	1,083,000	[3]	0	[3]	0	[3]	0	[3]	0	[3]	0	[3]	0	[3]	1,083,000	[3]	1,083,000	[3]																																																																																						5,702,000	5,592,000	0	0		0	5,702,000	5,592,000
Fair Value	5,702,000																						4,619,000	[1],[2]	4,509,000	[1],[2]	0	[1],[2]	0	[1],[2]	0	[1],[2]	0	[1],[2]	0	[1],[2]	0	[1],[2]	4,619,000	[1],[2]	4,509,000	[1],[2]	1,083,000	[3]	1,083,000	[3]	0	[3]	0	[3]	0	[3]	0	[3]	0	[3]	0	[3]	1,083,000	[3]	1,083,000	[3]																																																																																						5,702,000	5,592,000	0	0		0	5,702,000	5,592,000
Unrealized Gains	5,702,000																						4,619,000	[1],[2]	4,509,000	[1],[2]	0	[1],[2]	0	[1],[2]	0	[1],[2]	0	[1],[2]	0	[1],[2]	0	[1],[2]	4,619,000	[1],[2]	4,509,000	[1],[2]	1,083,000	[3]	1,083,000	[3]	0	[3]	0	[3]	0	[3]	0	[3]	0	[3]	0	[3]	1,083,000	[3]	1,083,000	[3]																																																																																						5,702,000	5,592,000	0	0		0	5,702,000	5,592,000
Unrealized Losses	(5,702,000)																						(4,619,000)	[1],[2]	(4,509,000)	[1],[2]	0	[1],[2]	0	[1],[2]	0	[1],[2]	0	[1],[2]	0	[1],[2]	0	[1],[2]	(4,619,000)	[1],[2]	(4,509,000)	[1],[2]	(1,083,000)	[3]	(1,083,000)	[3]	0	[3]	0	[3]	0	[3]	0	[3]	0	[3]	0	[3]	(1,083,000)	[3]	(1,083,000)	[3]																																																																																						(5,702,000)	(5,592,000)	0	0		0	(5,702,000)	(5,592,000)
OTTI	$ 5,592,000																						$ 4,619,000	[1],[2]	$ 4,509,000	[1],[2]	$ 0	[1],[2]	$ 0	[1],[2]	$ 0	[1],[2]	$ 0	[1],[2]	$ 0	[1],[2]	$ 0	[1],[2]	$ 4,619,000	[1],[2]	$ 4,509,000	[1],[2]	$ 1,083,000	[3]	$ 1,083,000	[3]	$ 0	[3]	$ 0	[3]	$ 0	[3]	$ 0	[3]	$ 0	[3]	$ 0	[3]	$ 1,083,000	[3]	$ 1,083,000	[3]																																																																																						$ 5,702,000	$ 5,592,000	$ 0	$ 0	$ 0	$ 0	$ 5,702,000	$ 5,592,000

[1] FHLB stock held by the Banks is subject to certain restrictions under the membership requirements of the FHLB. Redemption of FHLB stock is dependent upon repayment of borrowings, if any, from the FHLB.

[2] Federal Reserve Bank stock held by MetroBank is subject to certain restrictions under Federal Reserve Bank Policy.

[3] The Company's ownership of common securities of MCBI Trust I is carried at cost.