Shares pledged as security

No definition available.

Name:	susg_SharesPledgedAsSecurity
Namespace Prefix:	susg_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Carrying amount as of the balance sheet date of cash collateral held for borrowed securities, for which the cash is restricted as to withdrawal or usage.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.1)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Section S99
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-Subparagraph (SX 210.7-03.(a),2)
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of assets pledged to secure a debt instrument.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Section 55
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-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of the required periodic payments including both interest and principal payments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-SubTopic 470
-Section 50
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-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

+ Details

Name:	us-gaap_DebtInstrumentPeriodicPayment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of the cost of borrowed funds accounted for as interest expense for debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 6
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6036836-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Section S99
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-URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227

+ Details

Name:	us-gaap_InterestExpenseDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Description of the interest rate for the amounts borrowed under the credit facility, including the terms and the method for determining the interest rate (for example, fixed or variable, LIBOR plus a percentage, increasing rate, timing of interest rate resets, remarketing provisions).

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityInterestRateDescription
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The effective interest rate during the reporting period.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityInterestRateDuringPeriod
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_LongtermDebtTypeAxis=susg_CreditFacilityAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=us-gaap_PresidentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=susg_LandfillGasCanadaLtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=us-gaap_ChiefFinancialOfficerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=us-gaap_DirectorMember
Namespace Prefix:
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Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=susg_CreditFacilityBMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=susg_CreditFacilityCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix:
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Long-Term Debt (Narrative) (Details)			3 Months Ended
Long-Term Debt (Narrative) (Details)	Sep. 13, 2017 USD ($)	Sep. 13, 2017 CAD ($)	Mar. 31, 2019 USD ($) shares	Mar. 31, 2019 CAD ($) shares	Mar. 31, 2018 USD ($)	Mar. 31, 2018 CAD ($)	Sep. 13, 2017 CAD ($)	Aug. 04, 2017 USD ($)	Aug. 04, 2017 CAD ($)	Jun. 15, 2017 USD ($)	Jun. 15, 2017 CAD ($)	Feb. 02, 2017 USD ($)	Feb. 02, 2017 CAD ($)
Interest Expense, Debt			$ 77,619	$ 103,189	$ 80,775	$ 102,118
Credit facility (a) [Member]
Line of Credit Facility, Interest Rate Description			The credit facility bears interest at the PACE base rate of 7.00% plus 1.25% per annum	The credit facility bears interest at the PACE base rate of 7.00% plus 1.25% per annum
Line of Credit Facility, Interest Rate During Period			8.25%	8.25%
Debt Instrument, Periodic Payment			$ 6,558	$ 8,764
Credit facility (a) [Member] \| President [Member]
Cash Collateral for Borrowed Securities												$ 1,197,280	$ 1,600,000
Credit facility (a) [Member] \| Landfill Gas Canada Ltd. [Member]
Shares pledged as security			3,300,000	3,300,000
Credit facility (a) [Member] \| Chief Financial Officer [Member]
Shares pledged as security			500,000	500,000
Credit facility (a) [Member] \| Directors [Member]
Shares pledged as security			2,000,000	2,000,000
Credit facility (b) [Member]
Line of Credit Facility, Interest Rate Description			bears interest at the PACE base of 7.00% plus 1.25% per annum	bears interest at the PACE base of 7.00% plus 1.25% per annum
Line of Credit Facility, Interest Rate During Period			8.25%	8.25%
Debt Instrument, Face Amount										$ 448,980	$ 600,000
Debt Instrument, Periodic Payment			$ 3,667	$ 4,901
Credit facility (c) [Member]
Line of Credit Facility, Interest Rate Description			bears interest at the PACE base of 7.00% plus 1.25% per annum	bears interest at the PACE base of 7.00% plus 1.25% per annum
Line of Credit Facility, Interest Rate During Period			8.25%	8.25%
Debt Instrument, Face Amount								$ 37,415	$ 50,000
Debt Instrument, Periodic Payment			$ 320	$ 427
Corporate Term Loan [Member]
Line of Credit Facility, Interest Rate Description			bears interest at PACE base rate of 7.00% plus 1.25% per annum	bears interest at PACE base rate of 7.00% plus 1.25% per annum
Line of Credit Facility, Interest Rate During Period			8.25%	8.25%
Debt Instrument, Face Amount	$ 2,786,779						$ 3,724,147
Debt Instrument, Periodic Payment	22,233	$ 29,711
Debt Instrument, Collateral Amount	$ 2,993,932						$ 4,000,978