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Other information (Tables) | 12 Months Ended
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Dec. 31, 2016
Supplemental Cash Flow Elements [Abstract] |
Schedule of supplemental cash flow information |
Year ended December 31, |  | 2016 |  |  | 2015 |
Cash paid during the year for: |  |  |  |
Interest |  | $ | 5,895 |  |  | $ | 9,187 |
Income taxes |  | — |  |  | — |
Cash received during the year for: |  |  |  |
Interest |  | 194 |  |  | 208 |
Income taxes |  | — |  |  | — |
Schedule of non-cash transactions |
Year ended December 31, |  | 2016 |  |  | 2015 |
Non-cash transactions: |  |  |  |
Addition of plant and equipment by means of capital leases |  | $ | 23,490 |  |  | $ | 20,058 |
Reclass from plant and equipment to assets held for sale |  | (1,374 | ) |  | (1,566 | )
Non-cash working capital exclusions: |  |  |  |
Decrease in inventory resulting from reclassification to plant and equipment |  | — |  |  | (1,128 | )
Decrease in inventory related to a non-monetary transaction |  | (575 | ) |  | — |
Net increase in accounts receivable related to sale of plant and equipment |  | — |  |  | (3,600 | )
Net decrease in accounts payable related to purchase of plant and equipment |  | — |  |  | (3,197 | )
Net decrease in accounts payable related to change in the lease inducement payable on the sublease |  | — |  |  | (107 | )
Increase in accrued liabilities related to the current portion of the deferred gain on sale leaseback |  | 365 |  |  | 128 |
Net decrease in accrued liabilities related to current portion of RSU liability |  | (671 | ) |  | (338 | )
Net decrease in accrued liabilities related to current portion of DSU liability |  | — |  |  | (408 | )
Net (decrease) increase in accrued liabilities related to the current portion of the senior executive stock options |  | — |  |  | (22 | )
Net increase (decrease) in accrued liabilities related to dividend payable |  | 569 |  |  | (697 | )
Schedule of net change in non-cash working capital | The table below represents the cash (used in) provided by non-cash working capital:
Year ended December 31, |  | 2016 |  |  | 2015 |
Operating activities: |  |  |  |
Accounts receivable |  | $ | (15,344 | ) |  | $ | 45,367 |
Unbilled revenue |  | 1,600 |  |  | 26,057 |
Inventories |  | (1,437 | ) |  | 3,746 |
Prepaid expenses and deposits |  | 126 |  |  | 690 |
Accounts payable |  | 4,517 |  |  | (29,751 | )
Accrued liabilities |  | 4,144 |  |  | (6,892 | )
Billings in excess of costs incurred and estimated earnings on uncompleted contracts |  | 614 |  |  | 457 |
|  | $ | (5,780 | ) |  | $ | 39,674 |

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- Definition Tabular disclosure of the net increase (decrease) in operating capital in the operating section of the statement of cash flows, represents the entire footnote disclosure that provides details regarding the net change during the reporting period of all assets and liabilities used in operating activities. + References No definition available. + Details
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- Definition Tabular disclosure of noncash investing and financing activities, classified as other. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
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