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Note 13 - Accrued Liabilities | 9 Months Ended
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Sep. 30, 2021
Notes to Financial Statements |
Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block] | 13. Accrued Liabilities The components of other accrued liabilities are as follows:
|  | As of |
|  | September 30, 2021 |  |  | December 31, 2020 |
Contract liabilities (Note 3) |  | $ | 1,246 |  |  | $ | 850 |
Accrued remediation contingency (Note 14) |  |  | — |  |  |  | 176 |
Other accrued liabilities |  |  | 583 |  |  |  | 1,073 |
Total other accrued liabilities |  | $ | 1,829 |  |  | $ | 2,099 |

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- Definition The entire disclosure for accounts payable, accrued expenses, and other liabilities that are classified as current at the end of the reporting period. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration