Shares pledged as security

No definition available.

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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
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-Subparagraph (SX 210.7-03.(a),2)
-URI http://asc.fasb.org/extlink&oid=119400593&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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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
-Paragraph 2
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-SubTopic 30
-Section 55
-Paragraph 8
-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

Incremental percentage increase (decrease) in the stated rate on a debt instrument.

+ References

No definition available.

+ Details

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

- 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

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-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

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

- Definition

Amount of interest costs capitalized disclosed as an adjusting item to interest costs incurred.

+ References

No definition available.

+ Details

Name:	us-gaap_InterestCostsCapitalizedAdjustment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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

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-URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227

+ Details

Name:	us-gaap_InterestExpenseDebt
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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

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

- Details

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Namespace Prefix:
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Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=susg_CreditFacilitiesAndCorporateTermLoanTheDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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- Details

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- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=srt_ChiefFinancialOfficerMember
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- Details

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- Details

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- Details

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- Details

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Long-Term Debt (Narrative) (Details)	1 Months Ended	3 Months Ended				9 Months Ended			12 Months Ended
Long-Term Debt (Narrative) (Details)	Sep. 15, 2019	Sep. 30, 2019 CAD ($) shares	Sep. 30, 2019 USD ($) shares	Sep. 30, 2018 CAD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2019 CAD ($) shares	Sep. 30, 2019 USD ($) shares	Sep. 30, 2018 USD ($)	Dec. 31, 2018 CAD ($)	Dec. 31, 2018 USD ($)	Sep. 11, 2019 CAD ($)	Sep. 11, 2019 USD ($)	Sep. 13, 2017 CAD ($)	Sep. 13, 2017 USD ($)	Aug. 04, 2017 CAD ($)	Aug. 04, 2017 USD ($)	Jun. 15, 2017 CAD ($)	Jun. 15, 2017 USD ($)	Feb. 02, 2017 CAD ($)	Feb. 02, 2017 USD ($)
Interest capitalized \| $								$ (53,873)
Interest Expense, Debt		$ 104,202	$ 78,919	$ 107,984	$ 82,720	$ 311,592	$ 234,441		$ 310,403	$ 241,153
Pace Savings & Credit Union Limited (''PACE'') [Member] \| Credit facilities and corporate term loan debt [Member]
Line of Credit Facility, Interest Rate Description	PACE base rate of 7.00% plus 1.75% per annum
Cash collateral for letter of credit											$ 276,831	$ 209,035
Increase in interest rate	0.50%
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						$ 8,764	$ 6,697
Credit facility (a) [Member] \| President [Member]
Cash Collateral for Borrowed Securities																			$ 1,600,000	$ 1,197,280
Credit facility (a) [Member] \| Landfill Gas Canada Ltd. [Member]
Shares pledged as security		3,300,000	3,300,000			3,300,000	3,300,000
Credit facility (a) [Member] \| Chief Financial Officer [Member]
Shares pledged as security		500,000	500,000			500,000	500,000
Credit facility (a) [Member] \| Director [Member]
Shares pledged as security		2,000,000	2,000,000			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 face amount																	$ 600,000	$ 448,980
Debt Instrument, Periodic Payment						$ 4,901	$ 3,745
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 face amount															$ 50,000	$ 37,415
Debt Instrument, Periodic Payment						$ 427	$ 326
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 face amount													$ 3,724,147	$ 2,786,779
Debt Instrument, Periodic Payment						$ 29,711	$ 22,702
Cash collateral for letter of credit													$ 4,000,978	$ 2,993,932