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Operating Segments (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2010 | Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2010
Schedule of segment revenue operating income from continuing operations and depreciation and amortization |  |  |  |  |  |  |  |  |  |  |
Total revenue | $ 13,843 | $ 13,959 | $ 12,210 | $ 11,916 | $ 13,901 | $ 12,999 | $ 13,334 | $ 12,522 | $ 51,928 | $ 52,756 | $ 54,488
Operating income (loss) | 4,638 | 4,793 | 3,689 | 3,222 | 2,933 | 4,257 | 4,212 | 4,121 | 16,342 | 15,523 | 11,991
Depreciation and amortization |  |  |  |  |  |  |  |  | 2,929 | 3,159 | 3,620
Medical Device [Member] |  |  |  |  |  |  |  |  |  |  |
Schedule of segment revenue operating income from continuing operations and depreciation and amortization |  |  |  |  |  |  |  |  |  |  |
Total revenue |  |  |  |  |  |  |  |  | 37,883 | 39,606 | 43,294
Operating income (loss) |  |  |  |  |  |  |  |  | 18,431 | 19,997 | 19,461
Depreciation and amortization |  |  |  |  |  |  |  |  | 1,414 | 1,604 | 2,136
In Vitro Diagnostics [Member] |  |  |  |  |  |  |  |  |  |  |
Schedule of segment revenue operating income from continuing operations and depreciation and amortization |  |  |  |  |  |  |  |  |  |  |
Total revenue |  |  |  |  |  |  |  |  | 14,045 | 13,150 | 11,194
Operating income (loss) |  |  |  |  |  |  |  |  | 4,542 | 4,314 | 3,296
Depreciation and amortization |  |  |  |  |  |  |  |  | 774 | 799 | 828
Corporate [Member] |  |  |  |  |  |  |  |  |  |  |
Schedule of segment revenue operating income from continuing operations and depreciation and amortization |  |  |  |  |  |  |  |  |  |  |
Operating income (loss) |  |  |  |  |  |  |  |  | (6,631) | (8,788) | (10,766)
Depreciation and amortization |  |  |  |  |  |  |  |  | $ 741 | $ 756 | $ 656

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