JOINT FILING AGREEMENT
EXHIBIT 1
The undersigned hereby agree to the joint filing of the Schedule 13G (and any amendments thereto) to which this Agreement is attached.
Dated: February 13, 2015
| OBERWEIS ASSET MANAGEMENT, INC. | ||
| By: | /s/ Xxxxxxx X. Xxxxx | |
| Xxxxxxx X. Xxxxx | ||
| Executive Vice President | ||
| XXXXX X. XXXXXXXX | ||
| /s/ Xxxxx X. Xxxxxxxx | ||
| XXXXX X. XXXXXXXX | ||
| /s/ Xxxxx X. Xxxxxxxx | ||
Page 10 of 10
