|**Capital Leases (Tables)**                                                     | 6 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                        
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|**Capital Leases [Abstract]**                                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|Schedule of Capital Leased Assets [Table Text Block]                            | The following table presents vehicles under capital lease as of:June 30, 2017December 31, 2016(in thousands)Vehicles$5,097$2,975Accumulated depreciation(1,240)(776)$3,857$2,199                                                                                                                                                                                                                                                                      
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|Vehicles                                                                        |                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|Accumulated depreciation                                                        |                                                                                                                                                                                                                                                                                                                                                                                                                                                       
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|Schedule of Future Minimum Lease Payments for Capital Leases [Table Text Block] | Future minimum lease payments by year and in the aggregate, under non-cancelable capital leases with terms of one year or more, consist of the following:For the Twelve Months Ending June 30,Amount(in thousands)2018$1,83620191,52720201,1954,558Less executory cost(189)Less amount representing interest(491)Present value of minimum lease payments$3,878Short-term capital lease obligations$1,474Long-term capital lease obligations2,404$3,878
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|For the Twelve Months Ending June 30,                                           |                                                                                                                                                                                                                                                                                                                                                                                                                                                       
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|2018                                                                            |                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|2019                                                                            |                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|2020                                                                            |                                                                                                                                                                                                                                                                                                                                                                                                                                                       
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|Less executory cost                                                             |                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|Less amount representing interest                                               |                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|Present value of minimum lease payments                                         |                                                                                                                                                                                                                                                                                                                                                                                                                                                       
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|Short-term capital lease obligations                                            |                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|Long-term capital lease obligations                                             |                                                                                                                                                                                                                                                                                                                                                                                                                                                       
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X- DefinitionCapital Leases [Abstract]
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duration X- DefinitionTabular disclosure of long-lived, depreciable assets that are subject to a lease meeting the criteria for capitalization and are used in the normal conduct of business to produce goods and services. Examples may include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.
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duration X- DefinitionTabular disclosure of future minimum lease payments as of the date of the latest balance sheet presented, in aggregate and for each of the five years succeeding fiscal years, with separate deductions from the total for the amount representing executor costs, including any profit thereon, included in the minimum lease payments and for the amount of the imputed interest necessary to reduce the net minimum lease payments to present value.
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