Note 15 - Quarterly Financial Data (Unaudited) (Detail) - Quarterly Results of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Revenues	$ 3,204	$ 3,167	$ 3,470	$ 4,014	$ 3,607	$ 5,521	$ 6,177	$ 6,688	$ 13,855	$ 21,993	$ 18,207
Gross margin	1,259	1,464	1,577	1,849	1,437	2,595	3,247	3,252	6,149	10,531	9,187
Loss before income tax	(1,181)	(532)	(1,127)	(933)	(949)	90	332	239	(3,773)	(288)	(9,056)
Net loss	$ (1,193)	$ (541)	$ (1,122)	$ (929)	$ (1,112)	$ 59	$ 317	$ 231	$ (3,785)	$ (505)	$ (8,419)
Basic EPS (in Dollars per share)	$ (0.17)	$ (0.08)	$ (0.16)	$ (0.13)	$ (0.16)	$ 0.01	$ 0.05	$ 0.03	$ (0.54)	$ (0.07)	$ (1.23)
Diluted EPS (in Dollars per share)	$ (0.17)	$ (0.08)	$ (0.16)	$ (0.13)	$ (0.16)	$ 0.01	$ 0.04	$ 0.03	$ (0.54)	$ (0.07)	$ (1.23)