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Recent Accounting Pronouncements - Impact of Adoption of ASC 842 (Details) - USD ($) $ in Thousands | Jun. 30, 2019 | Jan. 01, 2019 | Dec. 31, 2018
--- | --- | --- | ---
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Operating lease right-of-use assets | $ 986 |  |
Total assets | 213,890 |  | $ 223,524
Accrued liabilities | 10,945 |  | 15,371
Total current liabilities | 16,949 |  | 28,709
Long-term portion of lease obligations | 895 |  |
Total liabilities | 18,235 |  | 28,992
Total liabilities and equity | 213,890 |  | 223,524
Accounts Receivable, Net, Current | 18,275 |  | 19,586
Lease liability | $ 1,016 |  |
ASU 2016-02 |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Operating lease right-of-use assets |  |  | 1,086
Total assets |  |  | 1,086
Accrued liabilities |  |  | 128
Total current liabilities |  |  | 128
Long-term portion of lease obligations |  |  | 958
Total liabilities |  |  | 1,086
Total liabilities and equity |  |  | $ 1,086
Adjustment [Member] | ASU 2016-02 |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Operating lease right-of-use assets |  | $ 1,086 |
Total assets |  | 224,610 |
Accrued liabilities |  | 15,499 |
Total current liabilities |  | 28,837 |
Long-term portion of lease obligations |  | 958 |
Total liabilities |  | 30,078 |
Total liabilities and equity |  | 224,610 |
Lease liability |  | $ 1,100 |

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