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Short-term and Long-term Debt Obligations - CTBC (Details) - CTBC Bank
1 Months Ended
Apr. 30, 2016
Nov. 30, 2015
USD ($)
Sep. 30, 2016
USD ($)
Jun. 30, 2016
USD ($)
Apr. 01, 2016
USD ($)
Apr. 01, 2016
TWD
Nov. 30, 2015
TWD
CTBC 2015 Facility              
Debt Instrument [Line Items]              
Credit facility, maximum borrowing capacity   $ 30,340,000         TWD 1,000,000,000
CTBC 2015 Facility | Line of Credit | Revolving Credit Facility              
Debt Instrument [Line Items]              
Credit facility, term   12 months          
Credit facility, maximum borrowing capacity   $ 17,000,000          
Percent of eligible accounts receivable   80.00%         80.00%
CTBC 2015 Facility | Line of Credit | Revolving Credit Facility | CTBC's Established USD Interest Rate              
Debt Instrument [Line Items]              
Credit facility, basis spread on variable rate (as a percent)   0.30%          
CTBC 2015 Facility | Term Loan | Secured Debt              
Debt Instrument [Line Items]              
Credit facility, term   12 months          
Credit facility, maximum borrowing capacity   $ 22,017,000         TWD 700,000,000
CTBC 2015 Facility | Term Loan | Secured Debt | CTBC's Established NTD Interest Rate              
Debt Instrument [Line Items]              
Credit facility, basis spread on variable rate (as a percent)   0.25%          
CTBC 2016 Facility              
Debt Instrument [Line Items]              
Credit facility, maximum borrowing capacity         $ 40,000,000    
Credit facility, unused amount     $ 139,000        
CTBC 2016 Facility | Minimum              
Debt Instrument [Line Items]              
Interest rate (as a percent)     0.89% 0.90%      
CTBC 2016 Facility | Maximum              
Debt Instrument [Line Items]              
Interest rate (as a percent)     1.40% 1.25%      
CTBC 2016 Facility | Line of Credit | Revolving Credit Facility              
Debt Instrument [Line Items]              
Credit facility, term 12 months            
Credit facility, maximum borrowing capacity         $ 40,000,000    
Percent of eligible accounts receivable         80.00% 80.00%  
Debt, total outstanding borrowings     $ 18,800,000 $ 10,100,000      
CTBC 2016 Facility | Line of Credit | Revolving Credit Facility | CTBC's Established USD Interest Rate              
Debt Instrument [Line Items]              
Credit facility, basis spread on variable rate (as a percent) 0.30%            
CTBC 2016 Facility | Term Loan | Customs Bond              
Debt Instrument [Line Items]              
Credit facility, term 12 months            
Credit facility, maximum borrowing capacity         $ 3,089,000 TWD 100,000,000  
Interest rate, stated percentage         0.50% 0.50%  
CTBC 2016 Facility | Term Loan | Secured Debt              
Debt Instrument [Line Items]              
Credit facility, term 12 months            
Credit facility, maximum borrowing capacity         $ 21,620,000 TWD 700,000,000  
Debt, total outstanding borrowings     $ 21,061,000 $ 20,357,000      
CTBC 2016 Facility | Term Loan | Secured Debt | CTBC's Established NTD Interest Rate              
Debt Instrument [Line Items]              
Credit facility, basis spread on variable rate (as a percent) 0.25%