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Related Party Transactions - Additional Information (Detail) (USD $)
6 Months Ended 1 Months Ended 0 Months Ended 6 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Amway Global [Member]
Jun. 30, 2012
Amway Global [Member]
Dec. 31, 2012
Access Business Group, Llc [Member]
Sep. 14, 2012
Access Business Group, Llc [Member]
Sep. 21, 2012
Access Business Group International Llc [Member]
Jun. 30, 2013
Access Business Group International Llc [Member]
Jun. 30, 2013
ABG [Member]
Jun. 30, 2012
Maximum [Member]
Sales [Member]
Amway Global [Member]
Jun. 30, 2013
Minimum [Member]
Sales [Member]
Amway Global [Member]
Related Party Transaction [Line Items]                      
Commissions paid $ 237,000 $ 452,000                  
Purchase Order Received           1,000,000          
Purchase Order Shipped         500,000            
License Agreement Terms             5 years        
Prior Period Notice             60 days        
Proceeds from License Fees Received               5,250      
Revenue From Test Process 49.00%                    
Concentration Risk, Percentage     38.00% 64.00%           64.00% 38.00%
Accounts Receivable, Net                 $ 327,000