This excerpt taken from the OVTI DEF 14A filed Aug 10, 2009.
Participation in the Purchase Plan is voluntary and is dependent on each eligible employees election to participate and his or her determination as to the level of payroll deductions. Accordingly, future purchases under the Purchase Plan are not determinable. Non-employee directors are not eligible to participate in the Purchase Plan. No purchases have been made under the Purchase Plan since its adoption by the board of directors.