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Note 7 - Property and Equipment (Tables)

12 Months Ended

Sep. 30, 2020

Notes Tables

Property, Plant and Equipment [Table Text Block]

		September 30,
		2020				2019
Office furniture and equipment		$	1,181			$	1,498
Machinery and equipment			1,184				1,224
Leasehold improvements			2,056				2,019
Construction in progress			8				8
Property and equipment, gross			4,429				4,749
Accumulated depreciation			(2,499	)			(2,480	)
Property and equipment, net		$	1,930			$	2,269

Depreciation Expense [Member]

Notes Tables

Property, Plant and Equipment [Table Text Block]

		2020				2019
Depreciation expense		$	498			$	521

X

- Definition

Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation.

+ 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
-Subparagraph (SX 210.5-02(13))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

+ Details

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Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=gnss_DepreciationExpenseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: