XML 37 R27.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Inventories (Tables) | 3 Months Ended
--- | ---
Dec. 31, 2021
Inventory Disclosure [Abstract] |
Inventories | Inventories consist of the following (in thousands):
|  | December 31, 2021 |  |  | September 30, 2021 |
Finished goods |  | $ | 21,271 |  |  | $ | 19,368 |
Work in process |  |  | 5,241 |  |  |  | 8,247 |
Raw materials |  |  | 43,324 |  |  |  | 43,620 |
Obsolescence reserve |  |  | (36,593 | ) |  |  | (36,936 | )
|  |  | 33,243 |  |  |  | 34,299 |
Less current portion |  |  | 19,919 |  |  |  | 16,196 |
Non-current portion |  | $ | 13,324 |  |  | $ | 18,103 |

X
- Definition Schedule of inventory current and noncurrent. + References No definition available. + Details
Name: | geos_ScheduleOfInventoryCurrentAndNoncurrentTableTextBlock
Namespace Prefix: | geos_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_InventoryDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration