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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, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Sep. 30, 2013
Sales:          
Product $ 15,677 $ 14,783 $ 44,745 $ 49,625  
Service 6,959 4,250 20,126 16,101  
Total sales 22,636 19,033 64,871 65,726  
Income (loss) from operations 967 (667) 1,640 728  
Assets 49,739 49,270 49,739 49,270 47,225
Capital expenditures 75 199 370 675  
Depreciation and amortization 151 132 456 386  
High Performance Products and Solutions Segment
          
Sales:          
Product 2,697 454 5,873 3,044  
Service 2,137 159 4,485 1,259  
Total sales 4,834 613 10,358 4,303  
Income (loss) from operations 999 (1,093) 1,254 (1,317)  
Assets 15,932 15,340 15,932 15,340  
Capital expenditures 57 108 159 247  
Depreciation and amortization 53 40 159 116  
Germany
          
Sales:          
Product 3,323 1,471 8,176 7,329  
Service 3,546 3,064 12,220 10,839  
Total sales 6,869 4,535 20,396 18,168  
Income (loss) from operations 43 (96) 256 125  
Assets 15,271 13,046 15,271 13,046  
Capital expenditures 17 52 118 179  
Depreciation and amortization 46 47 141 135  
United Kingdom
          
Sales:          
Product 368 45 1,351 309  
Service 402 328 1,034 1,059  
Total sales 770 373 2,385 1,368  
Income (loss) from operations (20) (58) (19) (73)  
Assets 3,595 3,457 3,595 3,457  
Capital expenditures 0 1 45 7  
Depreciation and amortization 4 2 12 9  
U.S.
          
Sales:          
Product 9,289 12,813 29,345 38,943  
Service 874 699 2,387 2,944  
Total sales 10,163 13,512 31,732 41,887  
Income (loss) from operations (55) 580 149 1,993  
Assets 14,941 17,427 14,941 17,427  
Capital expenditures 1 38 48 242  
Depreciation and amortization 48 43 144 126  
Total
          
Sales:          
Product 12,980 14,329 38,872 46,581  
Service 4,822 4,091 15,641 14,842  
Total sales 17,802 18,420 54,513 61,423  
Income (loss) from operations (32) 426 386 2,045  
Assets 33,807 33,930 33,807 33,930  
Capital expenditures 18 91 211 428  
Depreciation and amortization $ 98 $ 92 $ 297 $ 270