| 
           9. Significant Customer Concentrations (Narrative) 
         | 
        3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
| 
           Sep. 30, 2013 
         | 
        
           Sep. 30, 2012 
         | 
        
           Sep. 30, 2013 
         | 
        
           Sep. 30, 2012 
         | 
        
           Mar. 31, 2013 
         | 
      |
| 
           One Customer 
         | 
        |||||
| Revenues | |||||
| Significant customer concentration | 33.00% | 27.00% | 37.00% | 28.00% | |
| Accounts Receivable | |||||
| Significant customer concentration | 33.00% | 33.00% | 34.00% | ||
| 
           Second Customer 
         | 
        |||||
| Revenues | |||||
| Significant customer concentration | 32.00% | 27.00% | |||
| Accounts Receivable | |||||
| Significant customer concentration | 30.00% | 30.00% | 26.00% | ||
| 
           Third Customer 
         | 
        |||||
| Accounts Receivable | |||||
| Significant customer concentration | 11.00% | 11.00% | 15.00% | ||