Quarterly report pursuant to Section 13 or 15(d)

Lease Obligations (Details Textual)

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Lease Obligations (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Debt Instrument [Line Items]        
Long-term Debt, Gross $ 6,273   $ 6,273  
Operating Leases, Rent Expense, Net, Total $ 317 $ 108 $ 460 $ 209
Lessee, Operating Lease, Renewal Term 5 years   5 years  
Lessee, Operating Lease, Term of Contract 5 years   5 years  
Selling And Marketing Expense Relating to Operating Lease Obligations     $ 175  
Capital Lease Obligations [Member]        
Debt Instrument [Line Items]        
Long-term Debt, Gross $ 166   $ 166  
Debt Instrument, Interest Rate, Stated Percentage 4.70%   4.70%  
Debt Instrument, Maturity Date     Jul. 01, 2020  
Debt Instrument Minimum Monthly Payments     $ 3