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Supplementary Data (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Other current assets:    
Income taxes receivable $ 500 $ 1,932
Other current assets 94 102
Total other current assets 594 2,034
Current portion of long-term debt and capital lease obligations:    
Long-term Debt 15,040 13,021
Capital leases 197 246
Total current portion of long-term debt and capital lease obligations 15,237 13,267
Accrued liabilities:    
Accrued salaries and wages 2,665 4,005
Accrued incentive compensation 3,240 8,237
Accrued vacation 2,632 2,305
Accrued insurance 1,511 1,726
Accrued interest 1,222 1,235
Accrued ad valorem and franchise taxes 1,749 981
Accrued commissions 458 543
Other accrued liabilities 835 1,059
Total accrued liabilities 14,312 20,091
Other long-term liabilities:    
Deferred rent 1,093 1,207
Incentive compensation 674 575
Contingent consideration 663 785
Total other long-term liabilities 2,430 2,567
Term Loan [Member] | Credit Agreement [Member]    
Current portion of long-term debt and capital lease obligations:    
Long-term Debt 13,125 11,250
Acquisition Debt, Deferred Purchase Price [Member] | Notes Payable, Other Payables [Member]    
Current portion of long-term debt and capital lease obligations:    
Long-term Debt $ 1,915 $ 1,771