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Segment Information and Concentrations - Major customers as a percentage of net accounts receivable balances (Details)
Jun. 30, 2013
Jun. 30, 2012
Company A
    
Percent of net accounts receivable balances 29.00% 28.00%
Threshold percentage for disclosure 10.00% 10.00%
Company B
    
Percent of net accounts receivable balances 19.00% 12.00%
Threshold percentage for disclosure 10.00% 10.00%
Company C
    
Percent of net accounts receivable balances 13.00% 16.00%
Threshold percentage for disclosure 10.00% 10.00%
Company D
    
Percent of net accounts receivable balances    11.00%
Threshold percentage for disclosure 10.00% 10.00%
Company E
    
Percent of net accounts receivable balances    12.00%
Threshold percentage for disclosure 10.00% 10.00%