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LONG-TERM DEBT (Details)
$ / shares in Units, ¥ in Millions
1 Months Ended 12 Months Ended
Aug. 25, 2019
USD ($)
Nov. 30, 2019
USD ($)
Nov. 30, 2019
CNY (¥)
Jul. 28, 2019
USD ($)
Apr. 30, 2019
USD ($)
Apr. 30, 2016
USD ($)
shares
$ / shares
Jan. 31, 2015
USD ($)
shares
$ / shares
Oct. 31, 2019
USD ($)
Oct. 31, 2019
CNY (¥)
Oct. 31, 2018
USD ($)
Oct. 29, 2017
USD ($)
Oct. 31, 2019
CNY (¥)
Mar. 31, 2011
USD ($)
Long-term debt [Abstract]                          
Long-term debt               $ 44,029,000   $ 57,453,000      
Current portion of long-term debt               (2,142,000)   (57,453,000)      
Long-term debt               $ 41,887,000   0      
Weighted-average interest rate of short -term debt               3.84%       3.84%  
Interest payments               $ 2,600,000   1,900,000 $ 2,100,000    
Repayments of debt               61,319,000   4,639,000 5,428,000    
Proceeds from debt               54,633,000   0 $ 0    
Maturities of Long-term Debt [Abstract]                          
2020               2,142,000          
2021               8,304,000          
2022               12,430,000          
2023               3,441,000          
2024               6,589,000          
2025               $ 11,123,000          
Master Lease Agreement [Member]                          
Long-term debt [Abstract]                          
Maximum borrowing capacity       $ 35,000,000                  
Proceeds from debt $ 3,500,000                        
Master Lease Agreement [Member] | LIBOR [Member]                          
Long-term debt [Abstract]                          
Basis spread on variable rate       1.00%                  
Term of variable rate       30 days                  
Effective interest rate               2.76%       2.76%  
Project Loans [Member]                          
Long-term debt [Abstract]                          
Long-term debt               $ 34,490,000   0      
Interest rate percentage               4.90%       4.90%  
Maturity date of debt               Dec. 31, 2025 Dec. 31, 2025        
Maximum borrowing capacity               $ 50,000,000          
Proceeds from credit facility               $ 34,500,000 ¥ 243.4        
Date of first required payment               Jun. 30, 2020 Jun. 30, 2020        
Maturities of Long-term Debt [Abstract]                          
2020               $ 1,275,000          
2021               6,377,000          
2022               5,685,000          
2023               3,441,000          
2024               6,589,000          
2025               6,305,000          
2026               $ 4,818,000          
Working Capital Loans [Member]                          
Long-term debt [Abstract]                          
Maturity date of debt               Jan. 31, 2022 Jan. 31, 2022        
Maximum borrowing capacity               $ 25,000,000.0          
Maturities of Long-term Debt [Abstract]                          
2020               867,000          
2021               1,927,000          
2022               $ 6,745,000          
Working Capital Loans [Member] | Minimum [Member]                          
Long-term debt [Abstract]                          
Basis spread on variable rate               0.2575% 0.2575%        
Working Capital Loans [Member] | Maximum [Member]                          
Long-term debt [Abstract]                          
Basis spread on variable rate               0.6775% 0.6775%        
Working Capital Loans (value added tax component) [Member]                          
Long-term debt [Abstract]                          
Long-term debt               $ 9,539,000   0      
Interest rate percentage               4.90%       4.90%  
Maximum borrowing capacity | ¥                       ¥ 140.0  
Repayments of debt               $ 100,000          
Amount outstanding under credit facility               $ 9,500,000       ¥ 67.3  
Working Capital Loans, Fund Operations [Member]                          
Long-term debt [Abstract]                          
Interest rate percentage               4.60%       4.60%  
Maximum borrowing capacity | ¥                       ¥ 60.0  
Proceeds from credit facility               $ 5,200,000 ¥ 36.8        
Term of loan               1 year 1 year        
Working Capital Loans, Fund Operations [Member] | Subsequent Event [Member]                          
Long-term debt [Abstract]                          
Proceeds from credit facility   $ 1,100,000 ¥ 8.0                    
3.25% Convertible Senior Notes Matured April 2019 [Member]                          
Long-term debt [Abstract]                          
Long-term debt               $ 0   $ 57,453,000      
Interest rate percentage               3.25%       3.25%  
Maturity date of debt               Apr. 01, 2019 Apr. 01, 2019        
Repayments of debt         $ 57,500,000                
Face amount of debt               $ 57,500,000          
Number of shares each note is convertible to (in shares) | shares             96            
Face amount of each note converted             $ 1,000            
Conversion price per share (in dollars per share) | $ / shares             $ 10.37            
3.25% Convertible Senior Notes due in April 2016 [Member]                          
Long-term debt [Abstract]                          
Interest rate percentage           3.25%              
Maturity date of debt           Apr. 01, 2016              
Face amount of debt                         $ 57,500,000
Number of shares each note is convertible to (in shares) | shares           96              
Face amount of each note converted           $ 1,000              
Conversion price per share (in dollars per share) | $ / shares           $ 10.37              
Amended and Restated Credit Agreement [Member]                          
Long-term debt [Abstract]                          
Maximum borrowing capacity               $ 100,000,000          
Term of loan               5 years 5 years        
Current borrowing capacity               $ 50,000,000          
Cash limit for dividends, distributions and redemption on equity               100,000,000          
Cash limit for dividends, distributions and redemption on equity, annually thereafter               50,000,000          
Amount outstanding under credit facility               0          
Available borrowing capacity               $ 50,000,000          
Effective interest rate               2.78%       2.78%