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Unaudited Consolidated Statements Of Operations (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Sales:    
Product $ 15,154 $ 15,292
Services 5,939 5,335
Total sales 21,093 20,627
Cost of sales:    
Product 12,766 13,415
Services 3,504 2,684
Total cost of sales 16,270 16,099
Gross profit 4,823 4,528
Operating expenses:    
Engineering and development 383 510
Selling, general and administrative 3,676 3,375
Total operating expenses 4,059 3,885
Operating income 764 643
Other income (expense):    
Foreign exchange loss (16) (4)
Other income (expense), net (18) (17)
Total other income (expense), net (34) (21)
Income before income taxes 730 622
Income tax expense 269 233
Net income 461 389
Net income attributable to common stockholders $ 454 $ 385
Net income per share - basic $ 0.14 $ 0.11
Weighted average shares outstanding - basic 3,357 3,485
Net income per share - diluted $ 0.13 $ 0.11
Weighted average shares outstanding - diluted 3,395 3,521