SUBSEQUENT EVENTS (Details) - Subsequent Events $ / shares in Units, $ in Millions	Oct. 06, 2016 USD ($) $ / shares
Subsequent Events
Approximate value of acquisition	$ 49.2
Cash per share received in exchange for each share \| $ / shares	$ 26.00
Potential termination fee	$ 2.0

The cash each shareholder of the Company will receive in exchange for each share of Company common stock.

No definition available.

Name:	gtwn_BusinessAcquisitionEquityInterestReceivedCashPerShare
Namespace Prefix:	gtwn_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

The termination fee that would be payable to Salem Five Bancorp by the Company under certain circumstances, which are described in detail in the definitive agreement.

+ References

No definition available.

+ Details

Name:	gtwn_BusinessAcquisitionEquityInterestTerminationFee
Namespace Prefix:	gtwn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Value of equity interests (such as common shares, preferred shares, or partnership interest) issued or issuable to acquire the entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)(4)
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

+ Details

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

- 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

- Details

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