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Debt Obligations - Japan and Hong Kong Credit Facility (Details) - Revolving Credit Facilities - Revolving Credit Facility
1 Months Ended 12 Months Ended
Nov. 30, 2017
USD ($)
Mar. 30, 2019
USD ($)
Mar. 30, 2019
HKD ($)
Mar. 31, 2018
USD ($)
Nov. 30, 2017
JPY (¥)
Nov. 30, 2017
HKD ($)
Japan Credit Facility            
Line of Credit Facility [Line Items]            
Line of credit facility, maximum borrowing capacity $ 9,000,000       ¥ 1,000,000,000.0  
Line of credit, current obligations   $ 0   $ 0    
Japan Credit Facility | Bank Rate Two Days Prior            
Line of Credit Facility [Line Items]            
Debt instrument, basis spread on variable rate 0.30%          
HK Credit Facility            
Line of Credit Facility [Line Items]            
Line of credit facility, maximum borrowing capacity $ 13,000,000         $ 100,000,000.0
Line of credit, current obligations   0   $ 0    
Minimum commitment, amount           $ 5,000,000
Line of credit facility, available for future borrowings   $ 11,000,000 $ 88,000,000      
HK Credit Facility | HIBOR            
Line of Credit Facility [Line Items]            
Debt instrument, basis spread on variable rate   1.50%        
HK Credit Facility, Bank Guarantees            
Line of Credit Facility [Line Items]            
Bank guarantees supported by facility   $ 2,000,000 $ 12,000,000