Note 11 - Basic and Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Continuing Operations [Member]
Numerator:
Net income available to common stockholders	$ 3,104	$ 2,642	$ 4,108	$ 7,298
Operations	$ 3,104	$ 2,642	$ 4,108	$ 7,298
Effect of dilutive securities:
Continuing operations (in dollars per share)	$ 0.21	$ 0.16	$ 0.27	$ 0.46
(in dollars per share)	0.21	0.16	0.27	0.46
Diluted earnings per share:
Continuing operations (in dollars per share)	0.21	0.16	0.27	0.45
(in dollars per share)	$ 0.21	$ 0.16	$ 0.27	$ 0.45
Discontinued Operations [Member]
Numerator:
Net income available to common stockholders		$ 1,539		$ 1,945
Operations		$ 1,539		$ 1,945
Effect of dilutive securities:
Discontinued operations (in dollars per share)		$ 0.10		$ 0.12
(in dollars per share)		0.10		0.12
Diluted earnings per share:
Discontinued operations (in dollars per share)		0.10		0.12
(in dollars per share)		$ 0.10		$ 0.12
Employee Stock Option [Member]
Effect of dilutive securities:
Common stock options (in shares)	125,717	143,700	123,363	156,413
Net loss	$ 4,623	$ 6,634	$ 6,858	$ 12,871
Less dividends on convertible preferred stock	(1,099)	(1,104)	(2,197)	(1,698)
Less accretion of convertible preferred stock discount		(825)		(1,071)
Less income allocated to participating securities	(420)	(524)	(553)	(859)
Net income available to common stockholders	3,104	4,181	4,108	9,243
Operations	$ 3,104	$ 4,181	$ 4,108	$ 9,243
Denominator for basic earnings per share -- weighted-average shares (in shares)	14,893,595	16,097,198	14,975,582	16,036,959
Denominator for diluted earnings per share -- adjusted weighted-average shares assumed conversion (in shares)	15,019,312	16,240,898	15,098,945	16,193,372
(in dollars per share)	$ 0.21	$ 0.26	$ 0.27	$ 0.58
Diluted earnings per share:
(in dollars per share)	$ 0.21	$ 0.26	$ 0.27	$ 0.57