Note 15 - Financial Instruments (Tables)

12 Months Ended

Mar. 31, 2018

Statement Line Items [Line Items]

Disclosure of financial instruments at fair value through profit or loss [text block]

	For the			For the
	year ended			year ended
	March 31, 2018			March 31, 2017
Change in fair value of derivative instruments and other
Physical forward contracts and options (i)	$	400,583		$	215,935
Financial swap contracts and options (ii)		59,710			144,288
Foreign exchange forward contracts		(1,842	)		(1,756	)
Share swap		(4,484	)		(98	)
6.5% convertible bond conversion feature		7,764			14,261
Unrealized foreign exchange on 6.5% convertible bond		6,101			(4,309	)
Other derivative options		6,524			6,470
Change in fair value of derivative instruments and other	$	474,356		$	374,791

Disclosure of detailed information about financial instruments [text block]

	Financial assets (current)		Financial assets (non-current)		Financial liabilities (current)		Financial liabilities (non-current)
Physical forward contracts and options (i)	$	198,891	$	60,550	$	32,451	$	29,003
Financial swap contracts and options (ii)		8,133		1,342		34,369		22,117
Foreign exchange forward contracts		-		-		1,068		505
Share swap		-		-		18,400		-
6.5% convertible bond conversion feature		-		-		-		246
Other derivative options		11,745		2,770		-		-
As at March 31, 2018	$	218,769	$	64,662	$	86,288	$	51,871

	Financial assets (current)		Financial assets (non-current)		Financial liabilities (current)		Financial liabilities (non-current)
Physical forward contracts and options	$	982	$	983	$	89,472	$	124,173
Financial swap contracts and options		3,207		2,027		65,362		46,246
Foreign exchange forward contracts		565		-		-		295
Share swap		-		-		13,916		-
6.5% convertible bond conversion feature		-		-		-		8,010
Other derivative options		6,902		-		43		-
As at March 31, 2017	$	11,656	$	3,010	$	168,793	$	178,724

Disclosure of fair value measurement of assets and liabilities [text block]

	Level 1		Level 2			Level 3			Total
Derivative financial assets	$	-	$	-		$	283,431		$	283,431
Derivative financial liabilities		-		(21,092	)		(117,067	)		(138,159	)
Total net derivative assets (liabilities)	$	-	$	(21,092	)	$	166,364		$	145,272

	Level 1		Level 2			Level 3			Total
Derivative financial assets	$	-	$	-		$	14,666		$	14,666
Derivative financial liabilities		-		(17,741	)		(329,776	)		(347,517	)
Total net derivative liabilities	$	-	$	(17,741	)	$	(315,110	)	$	(332,851	)

Disclosure of fair value measurement of liabilities [text block]

	Year ended			Year ended
	March 31, 2018			March 31, 2017
Balance, beginning of year	$	(315,110	)	$	(638,231	)
Total gains (losses)		105,709			(42,084	)
Purchases		207,531			(30,265	)
Sales		(64,464	)		2,084
Settlements		232,698			393,386
Balance, end of year	$	166,364		$	(315,110	)

Disclosure of fair value measurement of assets [text block]

	Level 1		Level 2		Level 3		Total
Investment in ecobee	$	-	$	32,446	$	-	$	32,446
Investment in Energy Earth		-		3,900		-		3,900
Total investments	$	-	$	36,314	$	-	$	36,314

Disclosure of financial assets that are either past due or impaired [text block]

	March 31, 2018		March 31, 2017
Current	$	113,786	$	96,510
1– 30 days		44,374		30,672
31–60 days		21,241		12,806
61–90 days		12,686		8,358
Over 90 days		69,207		47,059
	$	261,294	$	195,405

Disclosure Of Allowance For Credit Losses [text block]

	March 31, 2018			March 31, 2017
Balance, beginning of year	$	49,431		$	58,789
Provision for doubtful accounts		56,300			56,041
Bad debts written off		(41,802	)		(64,262	)
Foreign exchange		(3,808	)		(1,137	)
Balance, end of year	$	60,121		$	49,431

Disclosure of maturity analysis for non-derivative financial liabilities [text block]

	Carrying		Contractual		Less than						More than
	amount		cash flows		1 year		1-3 years		4-5 years		5 years
Trade and other payables	$	616,434	$	616,434	$	616,434	$	-	$	-	$	-
Long-term debt 1		543,504		575,525		122,115		193,410		260,000		-
Gas, electricity and non-commodity contracts		138,159		3,171,037		1,867,389		1,202,949		69,658		31,041
	$	1,298,097	$	4,362,996	$	2,605,938	$	1,396,359	$	329,658	$	31,041

	Carrying		Contractual		Less than						More than
	amount		cash flows		1 year		1-3 years		4-5 years		5 years
Trade and other payables	$	499,169	$	499,169	$	499,169	$	-	$	-	$	-
Long-term debt 1		498,088		527,743		-		367,743		160,000		-
Gas, electricity and non-commodity contracts		347,517		3,397,692		1,982,896		1,189,745		188,282		36,769
	$	1,344,774	$	4,424,604	$	2,482,065	$	1,557,488	$	348,282	$	36,769

Disclosure of maturity analysis for contractual net interest payments [text block]

	Less than 1 year		1-3 years		4-5 years		More than 5 years
Interest payments	$	30,815	$	41,386	$	24,300	$	-