Note 3 - Earnings Per Share - Basic and Diluted EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended		12 Months Ended
		Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Net income (loss)		$ 2,252	$ (960)	$ 5,259
Weighted average shares - basic (in shares)		13,416	13,360
Effect of potentially dilutive common shares (1) (in shares)	[1]	105
Weighted average number of common shares outstanding - diluted (in shares)		13,521	13,360
Earnings (loss) per share - basic (in dollars per share)		$ 0.17	$ (0.07)
Earnings (loss) per share - diluted (in dollars per share)		$ 0.17	$ (0.07)
Equity Option [Member]
Anti-dilutive options not included in diluted earnings per share calculation (in shares)			120,700
Restricted Stock [Member]
Anti-dilutive options not included in diluted earnings per share calculation (in shares)		33,068	54,181

[1] Represents the effects of the assumed exercise of stock options and vesting of non-participating restricted shares. For periods in which a net loss is reported, there is no effect on the calculation of diluted loss per share because the conversion is anti-dilutive.