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Segment Information (Detail) - The following table presents certain operating segment information (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Sep. 30, 2012
Sales:          
Product $ 14,783 $ 16,328 $ 49,625 $ 43,607  
Service 4,250 6,026 16,101 18,869  
Total sales 19,033 22,354 65,726 62,476  
Profit (loss) from operations (667) 1,205 728 2,638  
Assets 49,270 47,366 49,270 47,366 51,066
Capital expenditures 199 78 675 373  
Depreciation and amortization 132 118 386 340  
Systems Segment
          
Sales:          
Product 454 1,132 3,044 2,594  
Service 159 2,159 1,259 5,407  
Total sales 613 3,291 4,303 8,001  
Profit (loss) from operations (1,093) 874 (1,317) 1,345  
Assets 15,340 14,266 15,340 14,266  
Capital expenditures 108 13 247 130  
Depreciation and amortization 40 30 116 78  
Germany
          
Sales:          
Product 1,471 5,179 7,329 12,998  
Service 3,064 2,869 10,839 10,159  
Total sales 4,535 8,048 18,168 23,157  
Profit (loss) from operations (96) 44 125 483  
Assets 13,046 15,049 13,046 15,049  
Capital expenditures 52 46 179 162  
Depreciation and amortization 47 43 135 124  
United Kingdom
          
Sales:          
Product 45 227 309 1,298  
Service 328 353 1,059 961  
Total sales 373 580 1,368 2,259  
Profit (loss) from operations (58) 30 (73) 147  
Assets 3,457 3,644 3,457 3,644  
Capital expenditures 1 0 7 25  
Depreciation and amortization 2 6 9 20  
U.S.
          
Sales:          
Product 12,813 9,790 38,943 26,717  
Service 699 645 2,944 2,342  
Total sales 13,512 10,435 41,887 29,059  
Profit (loss) from operations 580 257 1,993 663  
Assets 17,427 14,407 17,427 14,407  
Capital expenditures 38 19 242 56  
Depreciation and amortization 43 39 126 118  
Total
          
Sales:          
Product 14,329 15,196 46,581 41,013  
Service 4,091 3,867 14,842 13,462  
Total sales 18,420 19,063 61,423 54,475  
Profit (loss) from operations 426 331 2,045 1,293  
Assets 33,930 33,100 33,930 33,100  
Capital expenditures 91 65 428 243  
Depreciation and amortization $ 92 $ 88 $ 270 $ 262