Note 18 - Concentration of Risk in Customer and Supplier Relationships (Tables)
12 Months Ended
Dec. 31, 2013
Risks and Uncertainties [Abstract]  
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]
   

Year Ended

December 31,

 
   

2013

   

2012

 
                 

Sustainable Environmental Enterprises

    52.8 %     7.5 %

Lennox International Inc.

    2.5 %     30.1 %

Lowe’s Companies, Inc.

    6.9 %     7.7 %

Lennar Corporation

    0.0 %     8.8 %