Additional monthly installments to be paid before title of equipment passes to the lessee at expiration of lease term.

No definition available.

Name:	sqnf_ExpirationsLeaseTermAdditionalAmountFromLeasee
Namespace Prefix:	sqnf_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Final payment for title of the equipment passes to lessee at expiration of lease term.

+ References

No definition available.

+ Details

Name:	sqnf_ExpirationsLeaseTermFinalAmountFromLeasee
Namespace Prefix:	sqnf_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

One-time payment option for title of the equipment passes to lessee at expiration of lease term.

+ References

No definition available.

+ Details

Name:	sqnf_ExpirationsLeaseTermOneTimeAmountFromLeasee
Namespace Prefix:	sqnf_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount represents the purchase price paid for the direct finance lease.

+ References

No definition available.

+ Details

Name:	sqnf_LeaseTransactionAmount
Namespace Prefix:	sqnf_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Number of monthly installments for title of the equipment passes to lessee at expiration of lease term.

+ References

No definition available.

+ Details

Name:	sqnf_NumberOfMonthsExpirationsLeaseTermFromLeasee
Namespace Prefix:	sqnf_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Quarterly minimum lease payments for capital leases.

+ References

No definition available.

+ Details

Name:	sqnf_QuarterlyLeasePayments
Namespace Prefix:	sqnf_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Refers to rent holiday where the lessee makes no rental payments.

+ References

No definition available.

+ Details

Name:	sqnf_RentHolidayPayments
Namespace Prefix:	sqnf_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Initial lease term under the lease agreement.

+ References

No definition available.

+ Details

Name:	sqnf_TermPeriodOfLeaseAgreement
Namespace Prefix:	sqnf_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of minimum lease payments for capital leases.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737

+ Details

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

- Definition

A description of the significant provisions of the transaction involving the sale of property to another party and the lease of the property back to the seller.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6452660&loc=d3e36991-112694

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 40

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6456341&loc=d3e50796-112755

+ Details

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

Investments in Finance Leases (Details Narrative)	0 Months Ended		21 Months Ended		0 Months Ended				21 Months Ended		0 Months Ended
Investments in Finance Leases (Details Narrative)	Jun. 19, 2013 SQN Fund II Furniture and fixtures USD ($)	Jun. 30, 2013 SQN Fund II Furniture and fixtures USD ($)	Dec. 31, 2016 SQN Fund II Furniture and fixtures USD ($)	Mar. 31, 2015 SQN Fund II Furniture and fixtures USD ($)	Jun. 19, 2013 SQN Fund II Furniture and fixtures USD ($)	Jun. 19, 2013 SQN Fund II Information Technology Equipment USD ($)	Jun. 19, 2013 SQN Fund II GBP Furniture and fixtures GBP (£)	Jun. 30, 2013 SQN Fund II GBP Furniture and fixtures GBP (£)	Dec. 31, 2016 SQN Fund II GBP Furniture and fixtures GBP (£)	Mar. 31, 2015 SQN Fund II GBP Furniture and fixtures GBP (£)	Jun. 19, 2013 SQN Fund II GBP Furniture and fixtures USD ($)	Jun. 19, 2013 SQN Fund II GBP Furniture and fixtures GBP (£)	Jun. 19, 2013 SQN Fund II GBP Information Technology Equipment USD ($)	Jun. 19, 2013 SQN Fund II GBP Information Technology Equipment GBP (£)	Feb. 16, 2012 Anaerobic Digestion Plant	Jun. 19, 2013 Anaerobic Digestion Plant SQN Fund II USD ($) N	Feb. 16, 2012 Anaerobic Digestion Plant SQN Fund II	Jun. 19, 2013 Anaerobic Digestion Plant SQN Fund II GBP GBP (£)	Jun. 19, 2013 Anaerobic Digestion Plant SQN Bravo LLC ("Bravo")
Percentage of leased ownership purchase															80%	20%	20%		0.80
Purchase price	$ 283,089				$ 115,335	$ 46,528	£ 179,170				$ 72,997		$ 29,448			$ 187,332		£ 118,564
Lease term	Initial lease term through March 31, 2015 and a renewal period through December 31, 2016.				Remaining term of 12 months	Remaining term of 15 months through September 2014										28 months
Monthly lease payments																5,984		3,935
Rent holiday payments
Expirations lease term one time amount from leasee																24,360		16,018
Number of monthly installments for title of the equipment passes to lessee at expiration of lease term																4
Monthly installments for title of the equipment passes to lessee at expiration of lease term																5,984		3,935
Final payment for title of the equipment passes to lessee at expiration of lease term																1,159		762
Quarterly lease payments		$ 94,673	$ 10,265	$ 30,994	$ 28,328	$ 9,263		£ 62,252	£ 6,750	£ 20,380		£ 18,627		£ 6,091