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Note 5 - Costs and Estimated Earnings and Billings on Uncompleted Contracts (Tables)
 12 Months Ended
Dec. 31, 2012
Schedule of Excess Billings Over Earnings [Table Text Block]
 
As of December 31,
 
 
2012
 
2011
 
Costs incurred and estimated earnings on uncompleted   contracts
  $ 1,361,973     $ 997,527  
Billings on uncompleted contracts
    (1,360,299 )     (999,601 )
Excess of costs incurred and estimated earnings over billings (excess of billings over costs incurred and estimated earnings) on uncompleted contracts
  $ 1,674     $ (2,074 )
Schedule of Net Amount of Costs And Earnings on Uncompleted Contracts [Table Text Block]
 
As of December 31,
 
   
2012
   
2011
 
Costs and estimated earnings in excess of billings on uncompleted contracts
  $ 20,592     $ 16,509  
Billings in excess of costs and estimated earnings on uncompleted contracts
    (18,918 )     (18,583 )
Net amount of costs and estimated earnings on uncompleted contracts above (below) billings
  $ 1,674     $ (2,074 )