Exhibit 99.1
JOINT FILING UNDERTAKING
The undersigned, being duly authorized thereunto, hereby execute this agreement as an exhibit to this Amendment No. 10 to evidence the agreement of the below-named parties, in accordance with the rules promulgated pursuant to the Securities Exchange Act of 1934, as amended, to file this Amendment No. 10 on behalf of each party.
Dated: September 7, 2012.
| | BOSTON AVENUE CAPITAL LLC |
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| | By: | /s/ Stephen J. Heyman |
| | Stephen J. Heyman, Manager |
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| | YORKTOWN AVENUE CAPITAL, LLC |
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| | By: | /s/ Stephen J. Heyman |
| | Stephen J. Heyman, Manager |
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| | /s/ Stephen J. Heyman |
| | STEPHEN J. HEYMAN |
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| | /s/ James F. Adelson |
| | JAMES F ADELSON |
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| | /s/ Charles M. Gillman |
| | CHARLES M. GILLMAN |
