Note 7 - Earnings Per Share (Details) - Earnings Per Share (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Basic loss per share:
Net loss (in Dollars)	$ (2,162)	$ (853)	$ (1,128)	$ (1,016)	$ (474)	$ 76	$ (895)	$ (1,410)	$ (5,159)	$ (2,703)	$ (3,785)
Weighted average common shares outstanding									7,527	7,006	6,975
Basic loss per share (in Dollars per share)	$ (0.26)	$ (0.11)	$ (0.16)	$ (0.14)	$ (0.07)	$ 0.01	$ (0.13)	$ (0.20)	$ (0.69)	$ (0.39)	$ (0.54)
Diluted loss per share:
Net loss (in Dollars)	$ (2,162)	$ (853)	$ (1,128)	$ (1,016)	$ (474)	$ 76	$ (895)	$ (1,410)	$ (5,159)	$ (2,703)	$ (3,785)
Weighted average common shares outstanding									7,527	7,006	6,975
Weighted average common shares outstanding – assuming dilution									7,527	7,006	6,975
Diluted loss per share (in Dollars per share)	$ (0.26)	$ (0.11)	$ (0.16)	$ (0.14)	$ (0.07)	$ 0.01	$ (0.13)	$ (0.20)	$ (0.69)	$ (0.39)	$ (0.54)
Outstanding stock options that were not included in the diluted calculation because their effect would be anti-dilutive									362	686	750
Employee Stock Option [Member]
Diluted loss per share:
Dilutive stock options and restricted stock									0	0	0