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Note 15 - Guarantor Subsidiaries - Unaudited Interim Condensed Consolidating Statements of Cash Flows (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Mar. 31, 2017 | Jun. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017 | Dec. 31, 2017 | Dec. 31, 2016
Cash flows from operating activities | $ 38,285 | $ 45,821 | $ 75,210 | $ 74,115 | $ 115,878 | $ 225,328
Additions to properties, plants, and equipment |  |  | (83,285) | (70,390) |  |
Acquisition of Klondex, net of cash and restricted cash acquired |  |  | (139,326) |  |  |
Other investing activities, net |  |  | 38,023 | 32 |  |
Dividends paid to shareholders |  |  | (3,607) | (3,392) |  |
Borrowings on debt |  |  | 78,024 |  |  |
Proceeds from (payments on) debt |  |  | (88,028) | (5,535) |  |
Other financing activity, net |  |  | (2,069) | 6,141 |  |
Effect of exchange rates on cash |  |  | (215) | 1,051 |  |
Changes in cash, cash equivalents and restricted cash and cash equivalents |  |  | (125,273) | 2,022 |  |
Beginning cash, cash equivalents and restricted cash and cash equivalents | 171,977 | 171,977 | 186,107 | 171,977 | 171,977 |
Ending cash, cash equivalents and restricted cash and cash equivalents |  |  | 60,856 | 173,999 | 186,107 | 171,977
Additions to properties, plants, equipment and mineral interests |  |  | (83,285) | (70,390) |  |
Acquisitions of other companies, net of cash acquired |  |  | (139,326) |  |  |
Proceeds from (payments on) debt |  |  | 88,028 | 5,535 |  |
Reportable Legal Entities [Member] | Parent Company [Member] |  |  |  |  |  |
Cash flows from operating activities |  |  | (52,473) | 35,764 |  |
Additions to properties, plants, and equipment |  |  |  |  |  |
Acquisition of Klondex, net of cash and restricted cash acquired |  |  | (139,326) |  |  |
Other investing activities, net |  |  | (375,495) | 176 |  |
Dividends paid to shareholders |  |  | (3,607) | (3,392) |  |
Borrowings on debt |  |  | 78,024 |  |  |
Proceeds from (payments on) debt |  |  | (47,000) |  |  |
Other financing activity, net |  |  | 464,080 | (44,762) |  |
Effect of exchange rates on cash |  |  |  |  |  |
Changes in cash, cash equivalents and restricted cash and cash equivalents |  |  | (75,797) | (12,214) |  |
Beginning cash, cash equivalents and restricted cash and cash equivalents | 113,275 | 113,275 | 103,878 | 113,275 | 113,275 |
Ending cash, cash equivalents and restricted cash and cash equivalents |  |  | 28,081 | 101,061 | 103,878 | 113,275
Additions to properties, plants, equipment and mineral interests |  |  |  |  |  |
Acquisitions of other companies, net of cash acquired |  |  | (139,326) |  |  |
Proceeds from (payments on) debt |  |  | 47,000 |  |  |
Reportable Legal Entities [Member] | Guarantor Subsidiaries [Member] |  |  |  |  |  |
Cash flows from operating activities |  |  | 63,796 | 41,071 |  |
Additions to properties, plants, and equipment |  |  | (39,740) | (28,220) |  |
Acquisition of Klondex, net of cash and restricted cash acquired |  |  |  |  |  |
Other investing activities, net |  |  | 4,603 | 5,779 |  |
Dividends paid to shareholders |  |  |  |  |  |
Borrowings on debt |  |  |  |  |  |
Proceeds from (payments on) debt |  |  | (3,094) | (4,518) |  |
Other financing activity, net |  |  | (50,409) | (21,500) |  |
Effect of exchange rates on cash |  |  |  |  |  |
Changes in cash, cash equivalents and restricted cash and cash equivalents |  |  | (24,844) | (7,388) |  |
Beginning cash, cash equivalents and restricted cash and cash equivalents | 26,588 | 26,588 | 32,048 | 26,588 | 26,588 |
Ending cash, cash equivalents and restricted cash and cash equivalents |  |  | 7,204 | 19,200 | 32,048 | 26,588
Additions to properties, plants, equipment and mineral interests |  |  | (39,740) | (28,220) |  |
Acquisitions of other companies, net of cash acquired |  |  |  |  |  |
Proceeds from (payments on) debt |  |  | 3,094 | 4,518 |  |
Reportable Legal Entities [Member] | Non-Guarantor Subsidiaries [Member] |  |  |  |  |  |
Cash flows from operating activities |  |  | (15,107) | 21,435 |  |
Additions to properties, plants, and equipment |  |  | (43,545) | (42,170) |  |
Acquisition of Klondex, net of cash and restricted cash acquired |  |  |  |  |  |
Other investing activities, net |  |  | (294) | (584) |  |
Dividends paid to shareholders |  |  |  |  |  |
Borrowings on debt |  |  |  |  |  |
Proceeds from (payments on) debt |  |  | (37,934) | (1,017) |  |
Other financing activity, net |  |  | 72,463 | 42,909 |  |
Effect of exchange rates on cash |  |  | (215) | 1,051 |  |
Changes in cash, cash equivalents and restricted cash and cash equivalents |  |  | (24,632) | 21,624 |  |
Beginning cash, cash equivalents and restricted cash and cash equivalents | 32,114 | 32,114 | 51,213 | 32,114 | 32,114 |
Ending cash, cash equivalents and restricted cash and cash equivalents |  |  | 26,581 | 53,738 | 51,213 | 32,114
Additions to properties, plants, equipment and mineral interests |  |  | (43,545) | (42,170) |  |
Acquisitions of other companies, net of cash acquired |  |  |  |  |  |
Proceeds from (payments on) debt |  |  | 37,934 | 1,017 |  |
Consolidation, Eliminations [Member] |  |  |  |  |  |
Cash flows from operating activities |  |  | 78,994 | (24,155) |  |
Additions to properties, plants, and equipment |  |  |  |  |  |
Acquisition of Klondex, net of cash and restricted cash acquired |  |  |  |  |  |
Other investing activities, net |  |  | 409,209 | (5,339) |  |
Dividends paid to shareholders |  |  |  |  |  |
Borrowings on debt |  |  |  |  |  |
Proceeds from (payments on) debt |  |  |  |  |  |
Other financing activity, net |  |  | (488,203) | 29,494 |  |
Effect of exchange rates on cash |  |  |  |  |  |
Changes in cash, cash equivalents and restricted cash and cash equivalents |  |  |  |  |  |
Beginning cash, cash equivalents and restricted cash and cash equivalents |  |  |  |  |  |
Ending cash, cash equivalents and restricted cash and cash equivalents |  |  |  |  |  |
Additions to properties, plants, equipment and mineral interests |  |  |  |  |  |
Acquisitions of other companies, net of cash acquired |  |  |  |  |  |
Proceeds from (payments on) debt |  |  |  |  |  |

X
- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3044-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6676-107765 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of increase (decrease) in cash and cash equivalents. Cash and cash equivalents are the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Includes effect from exchange rate changes. + References No definition available. + Details
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