Annual report pursuant to Section 13 and 15(d)

Financing Notes Receivable - Black Bison Financing Notes (Details)

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Financing Notes Receivable - Black Bison Financing Notes (Details) - USD ($)
 3 Months Ended 12 Months Ended
Jun. 16, 2016
Dec. 31, 2014
Mar. 13, 2014
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Feb. 29, 2016
Jul. 23, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]                        
Advances on revolving line of credit               $ 10,000,000 $ 44,000,000 $ 45,392,332    
Provision for loan loss       $ 0 $ 0 $ 369,278 $ 4,645,188 0 5,014,466 13,784,137    
Proceeds from asset foreclosure and sale               $ 0 223,451 0    
Line of Credit [Member]                        
Accounts, Notes, Loans and Financing Receivable [Line Items]                        
Advances on revolving line of credit   $ 4,000,000                    
Basis spread on variable rate   2.00%                    
Black Bison Water Services LLC [Member] | Line of Credit [Member]                        
Accounts, Notes, Loans and Financing Receivable [Line Items]                        
Advances on revolving line of credit     $ 4,300,000                  
Maximum borrowing capacity     $ 11,500,000                 $ 15,300,000
Interest Rate     12.00%                  
Basis spread on variable rate     2.00%                  
Variable rent cap percentage     19.00%                  
Black Bison Water Services LLC [Member] | Long-term Debt [Member]                        
Accounts, Notes, Loans and Financing Receivable [Line Items]                        
Maximum borrowing capacity                       12,000,000
Subsidiaries [Member] | Long-term Debt [Member]                        
Accounts, Notes, Loans and Financing Receivable [Line Items]                        
Maximum borrowing capacity   $ 1,000,000                    
Subsidiaries [Member] | Black Bison Water Services LLC [Member] | Long-term Debt [Member]                        
Accounts, Notes, Loans and Financing Receivable [Line Items]                        
Maximum borrowing capacity                       $ 3,300,000
Loans Agreement [Member] | Subsidiaries [Member]                        
Accounts, Notes, Loans and Financing Receivable [Line Items]                        
Provision for loan loss                   13,800,000    
Deferred origination costs                   14,000    
Interest accrued                   $ 355,000    
Outstanding loan balance                     $ 2,000,000  
BB Intermediate [Member]                        
Accounts, Notes, Loans and Financing Receivable [Line Items]                        
Provision for loan loss                 $ 832,000      
Equity interest percentage                     100.00%  
Wells and Related Equipment and Facilities [Member] | Expedition Water Solutions [Member]                        
Accounts, Notes, Loans and Financing Receivable [Line Items]                        
Proceeds from asset foreclosure and sale $ 748,000                      
Fair value of future royalty payments $ 450,000