Note 11 - Earnings (Loss) Per Share - Computation of Basic and Diluted Loss Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Net income (loss)	$ 2,544	$ (2,846)	$ 3,579	$ (7,736)
Denominator:
Denominator for basic earnings (loss) per share – weighted average shares (in shares)	8,205	8,028	8,141	8,028
Effect of dilutive securities:
Employee restricted stock (in shares)	22		26
Denominator for diluted earnings per share – adjusted weighted average shares and assumed conversion (in shares)	8,227	8,028	8,167	8,028
Basic earnings (loss) per share (in dollars per share)	$ 0.31	$ (0.35)	$ 0.44	$ (0.96)
Diluted earnings (loss) per share (in dollars per share)	$ 0.31	$ (0.35)	$ 0.44	$ (0.96)
Weighted average anti-dilutive employee restricted stock (in shares)	99		61	2