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Notes Payable and Advances-related parties - Additional Information (Detail) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Debt Instrument [Line Items]        
Advance from related party     $ 145,000 $ 356,000
Annual interest rate     8.00%  
Non-cash interest expense 33,000 56,000 94,000 109,000
Xillex Technologies Corporation [Member]
       
Debt Instrument [Line Items]        
Note Payble And Accrued Interest $ 73,000