Note 15 - Segment Information (Details) - Revenue by Country (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Note 15 - Segment Information (Details) - Revenue by Country [Line Items]
Revenue by location	$ 1,406,700	$ 1,393,800	$ 2,746,900	$ 3,010,800
UNITED STATES
Note 15 - Segment Information (Details) - Revenue by Country [Line Items]
Revenue by location	593,200	564,800	1,144,200	1,208,400
BRAZIL
Note 15 - Segment Information (Details) - Revenue by Country [Line Items]
Revenue by location	198,300	121,100	355,400	254,100
Other Countries [Member]
Note 15 - Segment Information (Details) - Revenue by Country [Line Items]
Revenue by location	$ 615,200	$ 707,900	$ 1,247,300	$ 1,548,300