Commitments and Contingencies (Details Narrative) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Jun. 30, 2003	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Interest income, other		$ 82	$ 34	$ 212	$ 105
Letters of credit outstanding, amount		2,660		2,660
Bond outstanding		11,081		11,081
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		29,911		29,911
Sinking fund related to insurance policy		15,888		15,888		$ 15,676
Interest earned on sinking fund		1,417		1,417		$ 1,205
Interest income, other		$ 82	$ 35	$ 212	$ 96
Insurers obligation to entity on termination of contract		100.00%		100.00%