Note 3 - Common Stock Outstanding and Earnings Per Share - Basic and Diluted EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended		12 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Net income		$ 2,209	$ 1,556	$ 4,461	$ 596	$ 5,259
Weighted average shares - basic (in shares)		15,014	13,367	14,220	13,364
Effect of potentially dilutive common shares (1) (in shares)	[1]	99	58	101	44
Weighted average number of common shares outstanding - diluted (in shares)		15,113	13,425	14,321	13,408
Earnings per share - basic (in dollars per share)		$ 0.15	$ 0.11	$ 0.31	$ 0.04
Earnings per share - diluted (in dollars per share)		$ 0.15	$ 0.11	$ 0.31	$ 0.04
Equity Option [Member]
Anti-dilutive options not included in diluted earnings per share calculation (in shares)		68	116	77	116
Restricted Stock [Member]
Anti-dilutive options not included in diluted earnings per share calculation (in shares)		45		44	41

[1] Represents the effects of the assumed exercise of stock options and vesting of non-participating restricted shares.