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Other long term obligations | 12 Months Ended
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Dec. 31, 2014
Other Liabilities Disclosure [Abstract] |
Other long term obligations | Other long term obligations a) Other long term obligations are as follows:
|  | December 31, 2014 |  |  | December 31, 2013 |
Deferred lease inducements liability (note 16(b)) |  | 252 |  |  | 359 |
Asset retirement obligation (note 16(c)) |  | 562 |  |  | 512 |
Senior executive stock option plan (note 23(c)) |  | 22 |  |  | 940 |
Restricted share unit plan (note 23(d)) |  | 1,779 |  |  | 3,667 |
Directors' deferred stock unit plan (note 23(e)) |  | 2,005 |  |  | 3,662 |
Deferred gain on sale leaseback (note 16(d)) |  | 371 |  |  | — |
|  | $ | 4,991 |  |  | $ | 9,140 |
Less current portion of: |  |  |  |
Senior executive stock option plan (note 23(c)) |  | (22 | ) |  | — |
Restricted share unit plan (note 23(d)) |  | (1,009 | ) |  | (1,933 | )
Directors' deferred share unit plan (note 23(f)) |  | (408 | ) |  | — |
Deferred gain on sale leaseback (note 16(d)) |  | (93 | ) |  | — |
|  | $ | 3,459 |  |  | $ | 7,207 |
b) Deferred lease inducements liability Lease inducements applicable to lease contracts are deferred and amortized as a reduction of general and administrative expenses on a straight-line basis over the lease term, which includes the initial lease term and renewal periods only where renewal is determined to be reasonably assured.
|  | December 31, 2014 |  |  | December 31, 2013 |
Balance, beginning of year |  | $ | 359 |  |  | $ | 466 |
Amortization of deferred lease inducements |  | (107 | ) |  | (107 | )
Balance, end of year |  | $ | 252 |  |  | $ | 359 |
c) Asset retirement obligation The Company recorded an asset retirement obligation related to the future retirement of a facility on leased land. Accretion expense associated with this obligation is included in equipment costs in the Consolidated Statements of Operations. The following table presents a continuity of the liability for the asset retirement obligation:
|  | December 31, 2014 |  |  | December 31, 2013 |
Balance, beginning of year |  | $ | 512 |  |  | $ | 466 |
Accretion expense |  | 50 |  |  | 46 |
Balance, end of year |  | $ | 562 |  |  | $ | 512 |
At December 31, 2014, estimated undiscounted cash flows required to settle the obligation were $1,084 (December 31, 2013 – $1,084). The credit adjusted risk-free rate assumed in measuring the asset retirement obligation was 9.42%. The Company expects to settle this obligation in 2021. d) Deferred gain on sale leaseback The Company recorded a gain on the sale leaseback of certain heavy equipment. The gain on sale has been deferred and is being amortized over the term of the capital lease.
|  | December 31, 2014 |  |  | December 31, 2013 |
Balance, beginning of year |  | $ | — |  |  | $ | — |
Addition |  | 371 |  |  | — |
Balance, end of year |  | $ | 371 |  |  | $ | — |

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- Definition The entire disclosure for other liabilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20, 24 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20,24) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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