21 Receivables
| 
             2010   | 
            
             2009   | 
        |
|---|---|---|
            Current | 
            ||
| 
             Receivables  | 
            
             4,187  | 
            
             3,781  | 
        
| 
             Allowance for impairment of receivables  | 
            
             (14)  | 
            
             (19)  | 
        
| 
             Accrued revenue  | 
            
             5,417  | 
            
             5,261  | 
        
| 
             GST receivable  | 
            
             7,664  | 
            
             9,825  | 
        
| 
             Other receivables - external works  | 
            
             337  | 
            
             1,700  | 
        
| 
             17,591  | 
            
             20,548  | 
        |
| 
             Prepayments  | 
            
             924  | 
            
             2,114  | 
        
| 
             18,515  | 
            
             22,662  | 
        |
| 
             Reconciliation of changes in the allowance for impairment of receivables:  | 
            ||
| 
             Balance at start of year  | 
            
             19  | 
            
             14  | 
        
| 
             Doubtful debts expense recognised in the Statement of Comprehensive Income  | 
            
             3  | 
            
             6  | 
        
| 
             Reversal of provision  | 
            
             (3)  | 
            
             0  | 
        
| 
             Amount recovered during the year  | 
            
             (5)  | 
            
             (1)  | 
        
| 
             Balance at end of year  | 
            
             14  | 
            
             19  |