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Note 19 - Segment Geographic Information (Tables)
12 Months Ended
Sep. 30, 2023
Notes Tables  
Schedule of Segment Reporting Information, by Segment [Table Text Block]
  

YEAR ENDED SEPTEMBER 30,

 
  

2023

  

2022

 

Revenue:

        

Oil and Gas Markets

 $73,993  $49,141 

Adjacent Markets

  49,039   39,171 

Emerging Markets

  1,234   711 

Corporate

  243   230 

Total

  124,509   89,253 

Income (loss) from operations:

        

Oil and Gas Markets

  15,759   (7,539)

Adjacent Markets

  11,490   6,021 

Emerging Markets

  (4,003)  (9,128)

Corporate

  (11,918)  (12,490)

Total

  11,328   (23,136)

Depreciation and amortization expenses:

        

Oil and Gas Markets

  14,428   16,947 

Adjacent Markets

  703   743 

Emerging Markets

  565   1,068 

Corporate

  542   802 

Total

  16,238   19,560 

Impairment, inventory obsolescence and stock-based compensation expenses:

        

Oil and Gas Markets

  2,329   3,612 

Adjacent Markets

  656   932 

Emerging Markets

  52   4,423 

Corporate

  566   727 

Total

  3,603   9,694 

Interest income:

        

Oil and Gas Markets

  352   850 

Adjacent Markets

      

Emerging Markets

      

Corporate

  187   126 

Total

  539   976 

Interest expense:

        

Oil and Gas Markets

  105   65 

Adjacent Markets

      

Emerging Markets

      

Corporate

  29    

Total

  134   65 
Schedule of Revenue Generated by the Company's Subsidiaries [Table Text Block]
  

YEAR ENDED SEPTEMBER 30,

 
  

2023

  

2022

 

United States

 $118,017  $82,332 

Canada

  1,924   1,615 

Russian Federation

  1,850   1,922 

United Kingdom

  2,718   3,384 
  $124,509  $89,253 
Reconciliation of Revenue from Segments to Consolidated [Table Text Block]
  

YEAR ENDED SEPTEMBER 30,

 
  

2023

  

2022

 

Asia (including Russian Federation)

 $26,685  $13,823 

Canada

  2,703   1,225 

Europe

  20,826   28,381 

South America

  8,166   7,547 

United States

  62,611   35,171 

Other

  3,518   3,106 
  $124,509  $89,253 
Schedule of Disclosure on Geographic Areas, Long-Lived Assets in Individual Foreign Countries by Country [Table Text Block]
  

AS OF SEPTEMBER 30,

 
  

2023

  

2022

 

United States

 $75,321  $71,742 

Canada

  575   1,459 

Colombia

  442   449 

Russian Federation

  543   1,010 

United Kingdom

  383   422 

China

     13 
  $77,264  $75,095