XML 50 R39.htm IDEA: XBRL DOCUMENT v3.19.2
NSC and AdR project development (Details Textual)
$ / shares in Units, gal in Millions
 1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended 36 Months Ended
Apr. 12, 2019
MXN ($)
Feb. 28, 2018
Aug. 22, 2016
gal
Nov. 30, 2015
gal
Feb. 28, 2014
USD ($)
May 31, 2013
USD ($)
$ / shares
Nov. 30, 2012
USD ($)
m²
Feb. 29, 2012
USD ($)
May 31, 2010
gal
Jun. 30, 2019
USD ($)
Jun. 30, 2018
USD ($)
Jun. 30, 2019
USD ($)
Jun. 30, 2018
USD ($)
Dec. 31, 2015
gal
Dec. 31, 2014
USD ($)
ha
Feb. 26, 2019
MXN ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
Schedule of Investments [Line Items]                                    
General and administrative expenses                   $ 4,994,992 $ 4,446,969 $ 9,373,026 $ 9,108,680          
Assets, Total                   181,959,209   181,959,209         $ 172,515,598  
Liabilities, Total                   $ 10,223,416   $ 10,223,416         8,759,695  
Payments For Option Exercised         $ 1,000,000                          
Equity Method Investment, Ownership Percentage                   43.53%   43.53%            
Share Price | $ / shares           $ 1                        
Subscription Agreement Description   The Agreement calls for NSC to retain a minimum of 25% of the equity in AdR. One or more affiliates of Greenfield SPV VII, S.A.P.I. de C.V. ("Greenfield"), a Mexico company managed by an affiliate of a leading U.S. asset manager, will acquire a minimum of 55% of the equity of AdR. The Agreement also provides Suez MA with the option to purchase 20% of the equity of AdR. If Suez MA does not exercise this option, NSC will retain 35% of the equity of AdR and Greenfield will acquire 65% of the equity of AdR. The Agreement will become effective when the additional conditions related to the Project are met, including but not limited to those conditions discussed previously. The aggregate investment to be made by the equity partners in the Project, in the form of equity and subordinated shareholder loans, is presently estimated at approximately 20% of the total cost of Phase 1 of the Project. This Agreement was scheduled to expire on June 30, 2019 but has been extended to December 31, 2019.                                
Security Deposit Liability                               $ 1,000,000    
Loss Contingency, Damages Awarded, Value $ 12,000                                  
Loss Contingency, Actions Taken by Court, Arbitrator or Mediator Tenth Civil Judge granted EWG the opportunity to file a counter guarantee in the amount of 1,500,000 Mexican pesos to maintain the ex-parte preliminary relief granted in its favor.                                  
Aguas de Rosarito S.A.P.I. de C.V [Member]                                    
Schedule of Investments [Line Items]                                    
Equity Method Investment, Ownership Percentage                   50.00%   50.00%            
Option agreement [Member]                                    
Schedule of Investments [Line Items]                                    
Payments To Enter Option Agreement               $ 300,000                    
NSC Agua [Member]                                    
Schedule of Investments [Line Items]                                    
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners                 50.00%                  
Total Percentage Of Ownership Interest In An Acquired Company                 99.99%                  
Seawater Reverse Osmosis Desalination Plant Per Day Processing Capacity | gal     100           100                  
General and administrative expenses                   $ 779,000 $ 664,000 $ 1,263,000 $ 1,312,000          
Lease Term             20 years                      
Assets, Total                   29,100,000   29,100,000         26,200,000  
Liabilities, Total                   $ 394,000   $ 394,000         $ 243,000  
Operating Leases Rent Expense Two Months             $ 30,000                      
Percentage of Voting Interest Acquired through Option Agreement         25.00% 25.00%                        
Payments For Option Exercised         $ 1,000,000                          
Area of Land             5,000               20.1      
Equity Method Investment, Ownership Percentage                   50.00%   50.00%            
Real Estate Held-for-sale                   $ 24,200,000   $ 24,200,000            
NSC Agua [Member] | Aguas de Rosarito S.A.P.I. de C.V [Member]                                    
Schedule of Investments [Line Items]                                    
Equity Method Investment, Ownership Percentage   0.40%                               99.60%
NSC Agua [Member] | First Phase [Member]                                    
Schedule of Investments [Line Items]                                    
Seawater Reverse Osmosis Desalination Plant Per Day Processing Capacity | gal     50 50                   50        
NSC Agua [Member] | Second Phase [Member]                                    
Schedule of Investments [Line Items]                                    
Seawater Reverse Osmosis Desalination Plant Per Day Processing Capacity | gal     50 50                   50        
NSC Agua [Member] | Option agreement [Member]                                    
Schedule of Investments [Line Items]                                    
Total Percentage Of Ownership Interest In An Acquired Company                   99.99%   99.99%            
Repayment of inter-company loan payable           $ 5,700,000                        
Total Voting Interest Percentage After Conversion Of Loan           99.99%                        
Option Agreement Expiration Date               Feb. 07, 2014                    
NSA [Member]                                    
Schedule of Investments [Line Items]                                    
Payments to Acquire Land                             $ 20,600,000