Note 14 - Quarterly Financial Data (Unaudited) (Details) - Quarterly Results of Operations (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
Quarterly Results of Operations [Abstract]
Revenues	$ 2,870	$ 4,212	$ 3,262	$ 3,433	$ 4,322	$ 4,168	$ 3,818	$ 3,280	$ 13,777	$ 15,588	$ 13,855
Gross margin	9	1,308	919	1,074	1,659	1,985	1,395	1,270	3,310	6,309	6,149
Loss before income tax	(2,155)	(845)	(1,113)	(1,008)	(461)	89	(887)	(1,398)	(5,121)	(2,657)	(3,773)
Net loss	$ (2,162)	$ (853)	$ (1,128)	$ (1,016)	$ (474)	$ 76	$ (895)	$ (1,410)	$ (5,159)	$ (2,703)	$ (3,785)
Basic EPS (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 EPS (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)