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Prepaid expenses and deposits (Details) (CAD) In Thousands, unless otherwise specified	Mar. 31, 2013	Mar. 31, 2012
Current:
Prepaid insurance and property taxes	793	1,257
Prepaid lease payments	1,408	4,624
Prepaid interest	297	434
Prepaid expenses and deposits	2,498	6,315
Long term:
Prepaid lease payments (note 13(a))	764	895

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Sum of the amounts paid in advance for capitalized costs that will be expensed with the passage of time or the occurrence of a triggering event, and will be charged against earnings within one year or the normal operating cycle, if longer.

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Carrying amount as of the balance sheet date of interest payments made in advance of the payment period; such amounts will be charged against earnings within one year or the normal operating cycle, if longer.

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Carrying amount as of the balance sheet date of rental payments made in advance of the rental period; such amounts will be charged against earnings within one year or the normal operating cycle, if longer.

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