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Segment Information (Detail) - The following table presents certain operating segment information (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Mar. 31, 2014
Mar. 31, 2013
Sep. 30, 2013
Sales:          
Product $ 14,319 $ 19,537 $ 29,068 $ 34,842  
Service 6,584 6,286 13,167 11,851  
Total sales 20,903 25,823 42,235 46,693  
Income (loss) from operations 333 1,222 673 1,395  
Assets 52,690 51,405 52,690 51,405 47,225
Capital expenditures 109 341 295 476  
Depreciation and amortization 153 131 305 254  
High Performance Products and Solutions Segment
          
Sales:          
Product 2,170 2,494 3,176 2,590  
Service 1,065 143 2,348 1,100  
Total sales 3,235 2,637 5,524 3,690  
Income (loss) from operations 113 149 255 (224)  
Assets 15,644 15,945 15,644 15,945  
Capital expenditures 41 98 102 139  
Depreciation and amortization 54 39 106 76  
Germany
          
Sales:          
Product 3,452 3,794 4,853 5,858  
Service 4,486 4,571 8,674 7,775  
Total sales 7,938 8,365 13,527 13,633  
Income (loss) from operations 294 368 213 221  
Assets 20,882 15,869 20,882 15,869  
Capital expenditures 14 72 101 127  
Depreciation and amortization 49 46 95 88  
United Kingdom
          
Sales:          
Product 336 110 983 264  
Service 304 429 632 731  
Total sales 640 539 1,615 995  
Income (loss) from operations (30) (15) 1 (15)  
Assets 2,726 3,359 2,726 3,359  
Capital expenditures 22 3 45 6  
Depreciation and amortization 4 2 8 7  
U.S.
          
Sales:          
Product 8,361 13,139 20,056 26,130  
Service 729 1,143 1,513 2,245  
Total sales 9,090 14,282 21,569 28,375  
Income (loss) from operations (44) 720 204 1,413  
Assets 13,438 16,232 13,438 16,232  
Capital expenditures 32 168 47 204  
Depreciation and amortization 46 44 96 83  
Total
          
Sales:          
Product 12,149 17,043 25,892 32,252  
Service 5,519 6,143 10,819 10,751  
Total sales 17,668 23,186 36,711 43,003  
Income (loss) from operations 220 1,073 418 1,619  
Assets 37,046 35,460 37,046 35,460  
Capital expenditures 68 243 193 337  
Depreciation and amortization $ 99 $ 92 $ 199 $ 178