Note 9 - Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Numerator:
Net loss	$ (4,325)	$ 2,235
Less dividends on convertible preferred stock	(1,090)	(1,099)
Less income allocated to participating securities	(58)	(134)
Net (loss) income available to common stockholders	(5,473)	1,002
Operations	$ (5,473)	$ 1,002
Denominator:
Denominator for basic earnings per share -- weighted-average shares (in shares)	13,704,272	15,057,598
Effect of dilutive securities:
Denominator for diluted earnings per share -- adjusted weighted-average shares assumed conversion (in shares)	13,768,524	15,185,548
Basic (loss) earnings per common share:
Continuing operations (in dollars per share)	$ 0.03	$ 0.02
Discontinued operations (in dollars per share)	(0.43)	0.05
(in dollars per share)	(0.40)	0.07
Diluted (loss) earnings per share:
Continuing operations (in dollars per share)	0.03	0.02
Discontinued operations (in dollars per share)	(0.43)	0.05
(in dollars per share)	$ (0.40)	$ 0.07
Employee Stock Option [Member]
Effect of dilutive securities:
Common stock options (in shares)	58,313	121,009
Performance Restricted Stock Units [Member]
Effect of dilutive securities:
Performance-based restricted stock units (in shares)	5,939	6,941
Continuing Operations [Member]
Numerator:
Net (loss) income available to common stockholders	$ 394	$ 338
Operations	394	338
Discontinued Operations [Member]
Numerator:
Net (loss) income available to common stockholders	(5,867)	664
Operations	$ (5,867)	$ 664