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 6 Months Ended
Jul. 22, 2019
Jun. 30, 2003
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2018
Finite risk sinking fund (restricted cash) - current     $ 5,000   $ 5,000  
Interest income, other     107 $ 81 188 $ 130  
Letters of credit outstanding, amount     2,639   2,639    
Bond outstanding     29,465   29,465    
Subsequent Event [Member]              
Maximum allowable coverage of insurance policy $ 28,177            
Sinking funds received $ 5,000            
Sinking funds description On July 22, 2019, the Company received $5,000,000 of the sinking funds. Accordingly, at June 30, 2019, the Company reclassified $5,000,000 of the $16,159,000 in sinking funds initially included in other long term assets on the accompanying Consolidated Balance Sheets to sinking funds (restricted cash) included in current assets on the accompanying Consolidated Balance Sheets (See "Note 14 – Subsequent Events - 2003 Closure Policy" for a discussion of the release of the sinking funds by AIG and certain amendment made to the 2003 Closure Policy).            
American International Group, Inc [Member]              
Period of finite risk insurance policy   25 years          
Maximum allowable coverage of insurance policy     39,000   39,000    
Financial assurance coverage amount under insurance policy     30,549   30,549    
Sinking fund related to insurance policy     16,159   16,159   15,971
Interest earned on sinking fund     1,688   1,688   $ 1,500
Interest income, other     $ 107 $ 81 $ 188 $ 131  
Insurers obligation to entity on termination of contract     100.00%   100.00%