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, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Quarterly Results of Operations [Abstract]
Revenues	$ 4,322	$ 4,168	$ 3,818	$ 3,280	$ 3,204	$ 3,167	$ 3,470	$ 4,014	$ 15,588	$ 13,855	$ 21,993
Gross margin	1,659	1,985	1,395	1,270	1,259	1,464	1,577	1,849	6,309	6,149	10,531
(Loss) income before income tax	(461)	89	(887)	(1,398)	(1,181)	(532)	(1,127)	(933)	(2,657)	(3,773)	(288)
Net (loss) income	$ (474)	$ 76	$ (895)	$ (1,410)	$ (1,193)	$ (541)	$ (1,122)	$ (929)	$ (2,703)	$ (3,785)	$ (505)
Basic EPS (in Dollars per share)	$ (0.07)	$ 0.01	$ (0.13)	$ (0.20)	$ (0.17)	$ (0.08)	$ (0.16)	$ (0.13)	$ (0.39)	$ (0.54)	$ (0.07)
Diluted EPS (in Dollars per share)	$ (0.07)	$ 0.01	$ (0.13)	$ (0.20)	$ (0.17)	$ (0.08)	$ (0.16)	$ (0.13)	$ (0.39)	$ (0.54)	$ (0.07)