XML 38 R28.htm IDEA: XBRL DOCUMENT
v3.22.1

Inventories (Tables) | 6 Months Ended
--- | ---
Mar. 31, 2022
Inventory Disclosure [Abstract] |
Inventories | Inventories consist of the following (in thousands):
|  | March 31, 2022 |  |  | September 30, 2021 |
Finished goods |  | $ | 19,926 |  |  | $ | 19,368 |
Work in process |  |  | 3,507 |  |  |  | 8,247 |
Raw materials |  |  | 45,984 |  |  |  | 43,620 |
Obsolescence reserve |  |  | (36,709 | ) |  |  | (36,936 | )
|  |  | 32,708 |  |  |  | 34,299 |
Less current portion |  |  | 18,325 |  |  |  | 16,196 |
Non-current portion |  | $ | 14,383 |  |  | $ | 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