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Supplementary Information Supplementary Information (Balance Sheet Disclosures) (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Other current assets: |  |
Income tax receivables | $ 889 | $ 1,932
Other current assets | 97 | 102
Total other current assets | 986 | 2,034
Long-term Debt, Current Maturities | 16,927 | 13,021
Capital Lease Obligations, Current | 324 | 246
Long-term Debt and Capital Lease Obligations, Current | 17,251 | 13,267
Accrued Income Taxes, Current | 1,120 | 509
Deferred Rent Credit, Current | 241 | 208
Other liabilities | 1,361 | 717
Accrued liabilities: |  |
Accrued salaries and wages | 2,643 | 4,005
Accrued incentive compensation | 6,412 | 8,237
Accrued vacation | 2,417 | 2,305
Accrued insurance | 1,832 | 1,726
Accrued interest | 1,271 | 1,235
Accrued ad valorem and franchise taxes | 1,003 | 981
Accrued commissions | 461 | 543
Other accrued liabilities | 1,520 | 1,059
Total accrued liabilities | 17,559 | 20,091
Deferred Rent Credit, Noncurrent | 966 | 1,207
Accrued Bonuses | 1,287 | 575
Business Combination, Contingent Consideration, Liability, Noncurrent | 1,125 | 785
Other long-term liabilities | 3,378 | 2,567
Term Loan [Member] | Credit Agreement [Member] |  |
Other current assets: |  |
Long-term Debt, Current Maturities | 15,000 | 11,250
Acquisition Debt, Deferred Purchase Price [Member] | Notes payable, other |  |
Other current assets: |  |
Long-term Debt, Current Maturities | $ 1,927 | $ 1,771

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