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Note 7 - 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, 2013
Mar. 31, 2012
Mar. 31, 2013
Mar. 31, 2012
Sep. 30, 2012
Product $ 19,537 $ 12,125 $ 34,842 $ 27,279  
Service 6,286 6,904 11,851 12,843  
Total sales 25,823 19,029 46,693 40,122  
Profit (loss) from operations 1,222 669 1,395 1,433  
Assets 51,405 43,530 51,405 43,530 51,066
Capital expenditures 341 210 476 295  
Depreciation and amortization 131 112 254 222  
Systems Segment [Member]
          
Product 2,494 223 2,590 1,462  
Service 143 2,141 1,100 3,248  
Total sales 2,637 2,364 3,690 4,710  
Profit (loss) from operations 149 443 (224) 471  
Assets 15,945 12,628 15,945 12,628  
Capital expenditures 98 88 139 117  
Depreciation and amortization 39 25 76 48  
Germany [Member]
          
Product 3,794 3,968 5,858 7,819  
Service 4,571 3,703 7,775 7,290  
Total sales 8,365 7,671 13,633 15,109  
Profit (loss) from operations 368 164 221 439  
Assets 15,869 16,523 15,869 16,523  
Capital expenditures 72 90 127 116  
Depreciation and amortization 46 42 88 81  
UK [Member]
          
Product 110 718 264 1,071  
Service 429 292 731 608  
Total sales 539 1,010 995 1,679  
Profit (loss) from operations (15) 91 (15) 117  
Assets 3,359 2,571 3,359 2,571  
Capital expenditures 3 6 6 25  
Depreciation and amortization 2 7 7 14  
US [Member]
          
Product 13,139 7,216 26,130 16,927  
Service 1,143 768 2,245 1,697  
Total sales 14,282 7,984 28,375 18,624  
Profit (loss) from operations 720 (29) 1,413 406  
Assets 16,232 11,808 16,232 11,808  
Capital expenditures 168 26 204 37  
Depreciation and amortization 44 38 83 79  
Total Service and System Integration Segment [Member]
          
Product 17,043 11,902 32,252 25,817  
Service 6,143 4,763 10,751 9,595  
Total sales 23,186 16,665 43,003 35,412  
Profit (loss) from operations 1,073 226 1,619 962  
Assets 35,460 30,902 35,460 30,902  
Capital expenditures 243 122 337 178  
Depreciation and amortization $ 92 $ 87 $ 178 $ 174