XML 44 R23.htm IDEA: XBRL DOCUMENT v3.20.2

Organization, Basis of Presentation and Significant Accounting Policies - Additional Information (Details)	Jul. 27, 2020
Subsequent Event
Subsequent Event [Line Items]
Rent obligations deferred (as percent)	2.00%

X

- Definition

Rent Obligations Deferred, Percentage

+ References

No definition available.

+ Details

Name:	good_RentObligationsDeferredPercentage
Namespace Prefix:	good_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

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

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: