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Short Term Borrowings and Long Term Borrowings - Additional Information (Detail)
¥ / shares in Units, AUD in Thousands, $ in Thousands, ¥ in Millions
1 Months Ended 12 Months Ended
Jan. 31, 2016
USD ($)
Aug. 31, 2015
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2015
CNY (¥)
¥ / shares
Dec. 31, 2014
USD ($)
Dec. 31, 2015
AUD
Schedule Of Loans Payable Details [Line Items]            
Bank loan     $ 103,223   $ 48,286  
Short-term debt     160,400   48,286  
Fund received from individual investors     254,608   47,467  
Outstanding borrowings     164,851   48,286  
Loan financing through on-line platform     56,898      
Loan financing through on-line platform     3,622      
Long term borrowings     4,451      
Amount waived and written off arise due to offsetting payable from receivable     $ 616   $ 2,142  
Short term borrowing, average interest rate     7.20%   6.27% 7.20%
Solar Energy's Online Platform            
Schedule Of Loans Payable Details [Line Items]            
Fund received from individual investors     $ 126,099 ¥ 817    
Outstanding borrowings     60,520      
Loan financing through on-line platform     56,898      
Loan financing through on-line platform     3,622      
CEV IV 01 Holdings Limited ("CEV")            
Schedule Of Loans Payable Details [Line Items]            
Loan financing through on-line platform     548      
Convertergy I Holdings Limited ("Convertergy I Holdings")            
Schedule Of Loans Payable Details [Line Items]            
loan receivable offset by loan payable     853      
Convertergy I Holdings Limited ("Convertergy I Holdings") | Impairment Charges            
Schedule Of Loans Payable Details [Line Items]            
Amount waived and written off arise due to offsetting payable from receivable     305      
Long Term Borrowing Matures in 2017 | Solar Energy's Online Platform            
Schedule Of Loans Payable Details [Line Items]            
Long term borrowings     $ 1,937      
Long term debt maturity year     2017 2017    
Long Term Borrowing Matures in 2018 | Solar Energy's Online Platform            
Schedule Of Loans Payable Details [Line Items]            
Long term borrowings     $ 1,685      
Long term debt maturity year     2018 2018    
Loans Payable | Solar Juice Pty Ltd Majority Shareholders            
Schedule Of Loans Payable Details [Line Items]            
Short-term debt     $ 278     AUD 382
Loans Payable | China Minsheng Bank            
Schedule Of Loans Payable Details [Line Items]            
Bank loan     $ 48,164      
Debt instrument, interest rate, stated percentage     4.5675%     4.5675%
Loans Payable | Bank of Suzhou            
Schedule Of Loans Payable Details [Line Items]            
Bank loan     $ 46,312      
Debt instrument, interest rate, stated percentage     6.60%     6.60%
Loans Payable | Westpac Bank            
Schedule Of Loans Payable Details [Line Items]            
Debt instrument repayment date start     Feb. 02, 2016 Feb. 02, 2016    
Debt instrument repayment date, end     Apr. 29, 2016 Apr. 29, 2016    
Loans Payable | CEV IV 01 Holdings Limited ("CEV")            
Schedule Of Loans Payable Details [Line Items]            
Short-term debt   $ 1,500        
Debt instrument, interest rate, stated percentage   10.00%        
Loans Payable | Solar Juice Pty Ltd. | Westpac Bank            
Schedule Of Loans Payable Details [Line Items]            
Short-term debt     $ 4,106     AUD 5,635
Minimum | Solar Energy's Online Platform            
Schedule Of Loans Payable Details [Line Items]            
Debt instrument fixed interest rate     5.25%     5.25%
Funds raised from on-line products per unit | ¥ / shares       ¥ 16.7    
Percentage of discount offered on investment units     5.00% 5.00%    
Withdrawal lock-up period of principal amount     0 days 0 days    
Minimum | Loans Payable | Solar Juice Pty Ltd. | Westpac Bank            
Schedule Of Loans Payable Details [Line Items]            
Debt instrument fixed interest rate     2.27%     2.27%
Maximum | Solar Energy's Online Platform            
Schedule Of Loans Payable Details [Line Items]            
Debt instrument fixed interest rate     11.90%     11.90%
Funds raised from on-line products per unit | ¥ / shares       ¥ 300,000    
Percentage of discount offered on investment units     20.00% 20.00%    
Withdrawal lock-up period of principal amount     1080 days 1080 days    
Maximum | Loans Payable | Solar Juice Pty Ltd. | Westpac Bank            
Schedule Of Loans Payable Details [Line Items]            
Debt instrument fixed interest rate     5.35%     5.35%
Subsequent Events | Loans Payable | China Minsheng Bank            
Schedule Of Loans Payable Details [Line Items]            
Repayment of loan $ 46,312          
Subsequent Events | Loans Payable | Bank of Suzhou            
Schedule Of Loans Payable Details [Line Items]            
Repayment of loan $ 46,312