Annual report pursuant to Section 13 and 15(d)

COMMITMENTS AND CONTINGENT LIABILITIES (Details Textual)

v3.10.0.1
COMMITMENTS AND CONTINGENT LIABILITIES (Details Textual)
 12 Months Ended
Dec. 31, 2018
USD ($)
ft²
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Loss Contingencies [Line Items]      
Operating Leases, Rent Expense, Net | $ $ 60,000 $ 60,000 $ 60,000
Corporate Headquarters In Midland, Texas [Member]      
Loss Contingencies [Line Items]      
Area of Land | ft² 15,000    
Former Corporate Headquarters In Midland, Texas [Member]      
Loss Contingencies [Line Items]      
Area of Land | ft² 3,700    
Field Office In Andrews, Texas [Member]      
Loss Contingencies [Line Items]      
Area of Land | ft² 2,000    
Standby Letters of Credit [Member]      
Loss Contingencies [Line Items]      
Line of Credit Facility, Maximum Borrowing Capacity | $ $ 250,000    
Capital Lease Obligations [Member]      
Loss Contingencies [Line Items]      
Operating Leases, Rent Expense, Net | $ $ 524,060 $ 543,770 $ 527,582