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Financial instruments and risk management (Tables)

12 Months Ended

Dec. 31, 2013

Schedule of financial instruments with carrying amounts that differ from fair values

Financial instruments with carrying amounts that differ from their fair values are as follows:



	December 31, 2013				December 31, 2012
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Capital lease obligations ⁽ⁱ⁾	$	43,295	$	39,508	$	49,547	$	43,906
Series 1 Debentures ⁽ⁱⁱ⁾	75,000		77,813		225,000		200,110


(i)	The fair values of amounts due under capital leases are based on management estimates which are determined by discounting cash flows required under the instruments at the interest rates currently estimated to be available for instruments with similar terms.


(ii)	The fair value of the Series 1 Debentures is based upon the expected discounted cash flows and the period end market price of similar financial instruments.

Schedule of derivative financial instruments

Financial assets and liabilities measured at fair value net of accrued interest on a recurring basis, all of which are classified as Derivative financial instruments on the Consolidated Balance Sheets are summarized below:



December 31, 2012	Carrying Amount
Embedded price escalation features in certain long term supplier contracts	$	6,551
Less: current portion	(3,586		)
	$	2,965

Schedule of unrealized gains and losses on derivative financial instruments

The unrealized gains on derivative financial instruments is comprised as follows:



Year ended December 31,	2013			2012
Unrealized (gain) loss on embedded price escalation features in certain long term supplier contracts	$	(6,551	)	$	(4,017	)

Schedule of non-financial assets measured at fair value on a non-recurring basis

Non-financial assets measured at fair value on a non-recurring basis as at December 31, 2013 and December 31, 2012 in the financial statements are summarized below:



	December 31, 2013					December 31, 2012
	Carrying Amount		Change in Fair Value			Carrying Amount		Change in Fair Value
Assets held for sale	$	52	$	(3,097	)	$	251	$	(8,622	)

Schedule of maximum exposure to credit risk for accounts receivable and unbilled revenue

The Company’s maximum exposure to credit risk for accounts receivable and unbilled revenue is as follows:



	December 31, 2013		December 31, 2012
Trade accounts receivables	$	68,364	$	151,861
Other receivables	1,813		949
Total accounts receivable	$	70,177	$	152,810
Unbilled revenue	$	32,168	$	80,223

Schedule of trade receivables aging

Payment terms are generally net 30 days. As at December 31, 2013 and December 31, 2012, trade receivables are aged as follows:



	December 31, 2013		December 31, 2012
Not past due	$	59,337	$	81,752
Past due 1-30 days	3,948		38,487
Past due 31-60 days	1,538		14,142
More than 61 days	3,541		17,480
Total	$	68,364	$	151,861

Schedule of changes to the allowance for uncollectible accounts

The allowance is an estimate of the December 31, 2013 trade receivable balances that are considered uncollectible. Changes to the allowance are as follows:



Year ended December 31,	2013			2012
Opening balance	$	185		$	210
Payments received on provided balances	—			(1		)
Current year allowance	365			—
Write-offs	—			(24		)
Discontinued operations	(550		)	—
Ending balance	$	—		$	185

Total revenues

Concentration Risk [Line Items]

Schedule of major customers

The following customers accounted for 10% or more of total revenues:



Year ended December 31,	2013		2012
Customer A	29	%	23	%
Customer B	22	%	22	%
Customer C	18	%	14	%
Customer D	10	%	10	%
Customer E	2	%	10	%

Accounts receivable and unbilled revenue

Concentration Risk [Line Items]

Schedule of major customers

At December 31, 2013 and December 31, 2012, the following customers represented 10% or more of accounts receivable and unbilled revenue:

- Definition

Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities.

+ References+ Details

- Definition

Tabular disclosure of all significant concentrations of risk, including credit risk and market risk, arising from all financial instruments (as defined), whether from an individual counterparty or groups of counterparties. The disclosure concerning concentrations of risk may consist of the following information: (1) for concentrations of credit risk disclosure may include: (a) information about the (shared) activity, region, or economic characteristic that identifies the concentration, (b) the maximum amount of loss due to credit risk that, based on the gross fair value of the financial instrument, the entity would incur if parties to the financial instruments that make up the concentration failed completely to perform according to the terms of the contracts and the collateral or other security, if any, for the amount due proved to be of no value to the entity, (c) the policy of requiring collateral or other security to support financial instruments subject to credit risk, information about the entity's access to that collateral or other security, and the nature and a brief description of the collateral or other security supporting those financial instruments, and (d) the policy of entering into master netting arrangements to mitigate the credit risk of financial instruments, information about the arrangements for which the entity is a party, and a brief description of the terms of those arrangements, including the extent to which they would reduce the entity's maximum amount of loss due to credit risk and (2) for disclosure of quantitative information about the market risks of financial instruments that is consistent with the way the company manages or adjusts those risks, disclosure may include: (a) more details about current positions and perhaps activity during the period, (b) the hypothetical effects on comprehensive income (or net assets), or annual income, of several possible changes in market prices, (c) a gap analysis of interest rate re-pricing or maturity dates, (d) the duration of the financial instruments, (e) the entity's value at risk from derivatives and from other positions at the end of the reporting period and the average value at risk during the year, or (f) other ways of reporting quantitative information as internally developed.

+ References+ Details

- Definition

Tabular disclosure of the nature of a concentration, a benchmark to which it is compared, and the percentage that the risk is to the benchmark.

+ References+ Details

December 31, 2013

December 31, 2012

Customer 1

Customer 2

Customer 3