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Summary of Significant Accounting Policies and Select Balance Sheet Information (Tables) | 12 Months Ended
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Sep. 30, 2012
Description and Summary of Significant Accounting Policies and Select Balance Sheet Information [Abstract] |
Schedule of unrealized holding gains and losses, and fair value of available-for-sale securities |
|  | 2012 |
|  | Original Cost |  |  | Unrealized Gains |  |  | Unrealized Losses |  |  | Fair Value |
U.S. government and government agency obligations |  | $ | 28,641 |  |  | $ | 213 |  |  | $ | — |  |  | $ | 28,854 |
Mortgage-backed securities |  |  | 2,896 |  |  |  | 129 |  |  |  | (26 | ) |  |  | 2,999 |
Municipal bonds |  |  | 3,178 |  |  |  | 35 |  |  |  | — |  |  |  | 3,213 |
Asset-backed securities |  |  | 613 |  |  |  | — |  |  |  | (15 | ) |  |  | 598 |
Corporate bonds |  |  | 6,858 |  |  |  | 28 |  |  |  | — |  |  |  | 6,886 |
Total |  | $ | 42,186 |  |  | $ | 405 |  |  | $ | (41 | ) |  | $ | 42,550 |
|  | 2011 |
|  | Original Cost |  |  | Unrealized Gains |  |  | Unrealized Losses |  |  | Fair Value |
U.S. government and government agency obligations |  | $ | 30,433 |  |  | $ | 176 |  |  | $ | (6 | ) |  | $ | 30,603 |
Mortgage-backed securities |  |  | 3,871 |  |  |  | 131 |  |  |  | (54 | ) |  |  | 3,948 |
Municipal bonds |  |  | 3,561 |  |  |  | 53 |  |  |  | — |  |  |  | 3,614 |
Asset-backed securities |  |  | 1,336 |  |  |  | 1 |  |  |  | (49 | ) |  |  | 1,288 |
Corporate bonds |  |  | 2,474 |  |  |  | 32 |  |  |  | (9 | ) |  |  | 2,497 |
Total |  | $ | 41,675 |  |  | $ | 393 |  |  | $ | (118 | ) |  | $ | 41,950 |
Schedule of original cost and fair value of investments by contractual maturity |
|  | Amortized Cost |  |  | Fair Value |
Debt securities due within: |  |  |  |  |  |  |  |
One year |  | $ | 14,093 |  |  | $ | 14,117 |
One to five years |  |  | 23,903 |  |  |  | 24,149 |
Five years or more |  |  | 4,190 |  |  |  | 4,284 |
Total |  | $ | 42,186 |  |  | $ | 42,550 |
Schedule of sales available-for-sale securities |
|  | 2012 |  |  | 2011 |  |  | 2010 |
Proceeds from sales |  | $ | 43,556 |  |  | $ | 50,364 |  |  | $ | 23,986 |
Gross realized gains |  | $ | 229 |  |  | $ | 384 |  |  | $ | 302 |
Gross realized losses |  | $ | (1 | ) |  | $ | (4 | ) |  | $ | (3 | )
Schedule of components of inventories |
|  | 2012 |  |  | 2011 |
Raw materials |  | $ | 1,479 |  |  | $ | 1,218 |
Finished products |  |  | 2,045 |  |  |  | 1,963 |
Total |  | $ | 3,524 |  |  | $ | 3,181 |
Schedule of Property, Plant and Equipment |
|  | Useful Life |  |  | 2012 |  |  | 2011 |
|  | (In years) |  |  |  |  |  |  |
Land |  |  |  |  |  | $ | 4,359 |  |  | $ | 4,359 |
Laboratory fixtures and equipment |  |  | 3 to 10 |  |  |  | 13,004 |  |  |  | 13,236 |
Buildings and improvements |  |  | 3 to 20 |  |  |  | 14,702 |  |  |  | 14,655 |
Office furniture and equipment |  |  | 3 to 10 |  |  |  | 3,370 |  |  |  | 3,222 |
Construction-in-progress |  |  |  |  |  |  | 848 |  |  |  | 237 |
Less accumulated depreciation |  |  |  |  |  |  | (22,673 | ) |  |  | (21,123 | )
Property and equipment, net |  |  |  |  |  | $ | 13,610 |  |  | $ | 14,586 |
Schedule of other assets consist principally of strategic investments |
|  | 2012 |  |  | 2011 |
Investment in OctoPlus N.V. |  | $ | 718 |  |  | $ | 1,190 |
Investment in Nexeon MedSystems, Inc. |  |  | 285 |  |  |  | 285 |
Investment in ThermopeutiX, Inc. |  |  | 1,185 |  |  |  | 1,185 |
Investment in ViaCyte, Inc. |  |  | 559 |  |  |  | 559 |
Other |  |  | 84 |  |  |  | 84 |
Other assets, net |  | $ | 2,831 |  |  | $ | 3,303 |
Schedule of intangible assets |
|  | 2012 |
|  | Weighted Average Original Life (Years) |  |  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Net |
Definite-lived intangible assets: |  |  |  |  |  |  |  |  |  |  |  |
Customer lists |  |  | 9.0 |  |  | $ | 4,857 |  |  | $ | (2,734 | ) |  | $ | 2,123 |
Core technology |  |  | 8.0 |  |  |  | 530 |  |  |  | (343 | ) |  |  | 187 |
Patents and other |  |  | 16.8 |  |  |  | 2,256 |  |  |  | (716 | ) |  |  | 1,540 |
Subtotal |  |  |  |  |  |  | 7,643 |  |  |  | (3,793 | ) |  |  | 3,850 |
Unamortized intangible assets: |  |  |  |  |  |  |  |  |  |  |  |
Trademarks |  |  |  |  |  |  | 580 |  |  |  | — |  |  |  | 580 |
Total |  |  |  |  |  | $ | 8,223 |  |  | $ | (3,793 | ) |  | $ | 4,430 |
|  | 2011 |
|  | Weighted Average Original Life (Years) |  |  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Net |
Definite-lived intangible assets: |  |  |  |  |  |  |  |  |  |  |  |
Customer lists |  |  | 9.0 |  |  | $ | 4,857 |  |  | $ | (2,195 | ) |  | $ | 2,662 |
Core technology |  |  | 8.0 |  |  |  | 530 |  |  |  | (276 | ) |  |  | 254 |
Patents and other |  |  | 16.8 |  |  |  | 2,308 |  |  |  | (605 | ) |  |  | 1,703 |
Subtotal |  |  |  |  |  |  | 7,695 |  |  |  | (3,076 | ) |  |  | 4,619 |
Unamortized intangible assets: |  |  |  |  |  |  |  |  |  |  |  |
Trademarks |  |  |  |  |  |  | 580 |  |  |  | — |  |  |  | 580 |
Total |  |  |  |  |  | $ | 8,275 |  |  | $ | (3,076 | ) |  | $ | 5,199 |
Schedule of intangible assets in service |
2013 |  | $ | 742 |
2014 |  |  | 742 |
2015 |  |  | 731 |
2016 |  |  | 594 |
2017 |  |  | 183 |
Schedule of basic and diluted income (loss) per share |
|  | 2012 |  |  | 2011 |  |  | 2010 |
Basic weighted average shares outstanding |  |  | 17,318 |  |  |  | 17,419 |  |  |  | 17,372 |
Dilutive effect of outstanding stock options and non-vested stock |  |  | 113 |  |  |  | 43 |  |  |  | 8 |
Diluted weighted average shares outstanding |  |  | 17,431 |  |  |  | 17,462 |  |  |  | 17,380 |

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