Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies (Details Narrative)

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Commitments and Contingencies (Details Narrative) - USD ($)
$ in Thousands
 1 Months Ended 3 Months Ended
Jun. 30, 2003
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Interest income, other   $ 49 $ 35  
Letters of credit outstanding, amount   2,660    
Bond outstanding   8,767    
American International Group, Inc [Member]        
Period of finite risk insurance policy 25 years      
Maximum allowable coverage of insurance policy   39,000    
Financial assurance coverage amount under insurance policy   29,911    
Sinking fund related to insurance policy   15,726   $ 15,676
Interest earned on sinking fund   1,255   $ 1,205
Interest income, other   $ 50 $ 27  
Insurers obligation to entity on termination of contract   100.00%