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Basis of Presentation - Revision of Prior Period Financial Statements (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Sales:        
Total sales $ 13,721 $ 13,780 $ 39,197 $ 47,521
Cost of sales:        
Total cost of sales 9,492 9,556 27,222 34,783
Gross profit 4,229 4,224 11,975 12,738
Operating loss (357) (393) (1,015) (938)
Net loss $ (423) $ (210) $ (119) $ (1,482)
Net loss per share - basic $ (0.10) $ (0.05) $ (0.03) $ (0.37)
Net loss per share - diluted $ (0.10) $ (0.05) $ (0.03) $ (0.37)
Product        
Sales:        
Total sales $ 10,142 $ 10,399 $ 29,526 $ 37,104
Cost of sales:        
Total cost of sales 8,176 8,600 23,678 31,237
Service        
Sales:        
Total sales 3,579 3,381 9,671 10,417
Cost of sales:        
Total cost of sales $ 1,316 956 $ 3,544 3,546
As Reported        
Sales:        
Total sales   13,532   46,199
Cost of sales:        
Total cost of sales   9,308   33,461
Gross profit   4,224   12,738
Operating loss   (393)   (938)
Net loss   $ (210)   $ (1,482)
Net loss per share - basic   $ (0.05)   $ (0.37)
Net loss per share - diluted   $ (0.05)   $ (0.37)
As Reported | Product        
Sales:        
Total sales   $ 10,294   $ 35,812
Cost of sales:        
Total cost of sales   8,361   29,924
As Reported | Service        
Sales:        
Total sales   3,238   10,387
Cost of sales:        
Total cost of sales   947   3,537
Restatement Adjustment        
Sales:        
Total sales   248   1,322
Cost of sales:        
Total cost of sales   248   1,322
Restatement Adjustment | Product        
Sales:        
Total sales   105   1,292
Cost of sales:        
Total cost of sales   239   1,313
Restatement Adjustment | Service        
Sales:        
Total sales   143   30
Cost of sales:        
Total cost of sales   $ 9   $ 9