The number of warranty activities pertaining to continuing operations.

No definition available.

Name:	tgal_NumberOfWarrantyActivitiesRelatedToContinuingOperations
Namespace Prefix:	tgal_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

The number of warranty activities pertaining to discontinuing operations.

No definition available.

Name:	tgal_NumberOfWarrantyActivitiesRelatedToDiscontinuingOperations
Namespace Prefix:	tgal_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

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