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Accounts Receivable
 12 Months Ended
Dec. 31, 2011
Accounts Receivable [Abstract]  
Accounts Receivable
3. Accounts Receivable

 

$ in thousands    2011     2010  

Trade receivables

    $ 3,389      $ 2,989   

Contract receivables

      20,274        24,204   

Allowance for doubtful accounts

      (554 )      (421 ) 
  

 

 

    

 

 

  
   $ 23,109      $ 26,772   
  

 

 

    

 

 

  

Balances billed, but not paid by customers under retainage provisions in contracts, amounted to approximately $504,000 and $567,000 at December 31, 2011 and 2010, respectively. Retainage receivables on contracts in progress are generally collected within a year after contract completion.

Provision (recoveries) for doubtful accounts was approximately $402,000 and $(71,000) during 2011 and 2010, respectively, while accounts charged (recovered) to the allowance were $269,000 and $(16,000) during 2011 and 2010, respectively.