Exhibit A JOINT FILING UNDERTAKING
Exhibit A
The undersigned, being duly authorized thereunto, hereby execute this agreement as an exhibit to
this Schedule 13D to evidence the agreement of the below-named parties, in accordance with the
rules promulgated pursuant to the Securities Exchange Act of 1934, to file this Schedule jointly on
behalf of each such party.
Dated: August 10, 2011.
| Boston Avenue Capital LLC |
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| By: | /s/ ▇▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇ | |||
| ▇▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇, Managing Director | ||||
| /s/ ▇▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇ | ||||
| ▇▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇ | ||||
| /s/ ▇▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇ | ||||
| ▇▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇ | ||||
| /s/ ▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇ | ||||
| ▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇ | ||||
| ▇▇▇▇▇▇▇ Capital Fund, LLC |
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By its manager, ▇▇▇▇▇▇▇ Capital Management, LLC
| By: | /s/ ▇▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇ ▇▇▇▇▇ | |||
| ▇▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇ ▇▇▇▇▇, Managing Member | ||||
| ▇▇▇▇▇▇▇ Capital Management, LLC |
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| By: | /s/ ▇▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇ ▇▇▇▇▇ | |||
| ▇▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇ ▇▇▇▇▇, Managing Member | ||||
| /s/ ▇▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇ ▇▇▇▇▇ | ||||
| ▇▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇ ▇▇▇▇▇, | ||||
| T2 Accredited Fund, LP |
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| By: | /s/ ▇▇▇▇▇ ▇▇▇▇▇▇ | |||
| ▇▇▇▇▇ ▇▇▇▇▇▇, Principal | ||||
| T2 Qualified Fund, L P |
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| By: | /s/ ▇▇▇▇▇ ▇▇▇▇▇▇ | |||
| ▇▇▇▇▇ ▇▇▇▇▇▇, Principal | ||||
| ▇▇▇▇▇▇ Offshore Fund, Ltd. |
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| By: | /s/ ▇▇▇▇▇ ▇▇▇▇▇▇ | |||
| ▇▇▇▇▇ ▇▇▇▇▇▇, Principal | ||||
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| ▇▇▇▇▇▇ Focus Fund | ||||
| By: | /s/ ▇▇▇▇▇ ▇▇▇▇▇▇ | |||
| ▇▇▇▇▇ ▇▇▇▇▇▇, Principal | ||||
| /s/ ▇▇▇▇▇ ▇▇▇▇▇▇ | ||||
| ▇▇▇▇▇ ▇▇▇▇▇▇ | ||||
| /s/ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇ | ||||
| ▇▇▇▇▇▇▇ ▇▇▇▇▇▇ | ||||
| Prescott Group Capital Management, L.L.C. |
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| By: | /s/ ▇▇▇▇ ▇▇▇▇▇▇▇▇ | |||
| ▇▇▇▇ ▇▇▇▇▇▇▇▇, Managing Member | ||||
| Prescott Group Aggressive Small Cap, L.P. |
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| By: | Prescott Group Capital Management, L.L.C., | |||
| its general partner | ||||
| By: | /s/ ▇▇▇▇ ▇▇▇▇▇▇▇▇ | |||
| ▇▇▇▇ ▇▇▇▇▇▇▇▇, Managing Member | ||||
| Prescott Group Aggressive Small Cap II, L.P. |
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| By: | Prescott Group Capital Management, L.L.C., | |||
| its general partner | ||||
| By: | /s/ ▇▇▇▇ ▇▇▇▇▇▇▇▇ | |||
| ▇▇▇▇ ▇▇▇▇▇▇▇▇, Managing Member | ||||
| /s/ ▇▇▇▇ ▇▇▇▇▇▇▇▇ | ||||
| ▇▇▇▇ ▇▇▇▇▇▇▇▇ | ||||
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