Employee Benefit Plan	6 Months Ended
Jun. 30, 2011
Employee Benefit Plan [Abstract]
Compensation and Employee Benefit Plans [Text Block]	EMPLOYEE BENEFIT PLAN We have established a 401(k) tax-deferred savings plan (the “401(k) Plan”) which permits participants to make contributions by salary deduction pursuant to Section 401(k) of the Internal Revenue Code. Under the 401(k) Plan, participating employees may defer a portion of their pre-tax earnings, up to the IRS annual contribution limit ($16,500 for the calendar year 2011). In Canada, we have established a Group RRSP program (the "RRSP Plan") which permits participants to make tax deductible contributions up to the maximum RRSP contribution limits under the Income Tax Act. As of January 1, 2011, our board of directors approved 50% matching contributions on employee contributions, up to 4% of the employee's eligible earnings. Our matching contributions to the RRSP and 401(k) Plans for the three and six months ended June 30, 2011 were $390,449 and $756,663, respectively.

Employee Benefit Plan

6 Months Ended

Jun. 30, 2011

Compensation and Employee Benefit Plans [Text Block]

EMPLOYEE BENEFIT PLAN

We have established a 401(k) tax-deferred savings plan (the “401(k) Plan”) which permits participants to make contributions by salary deduction pursuant to Section 401(k) of the Internal Revenue Code. Under the 401(k) Plan, participating employees may defer a portion of their pre-tax earnings, up to the IRS annual contribution limit ($16,500 for the calendar year 2011). In Canada, we have established a Group RRSP program (the "RRSP Plan") which permits participants to make tax deductible contributions up to the maximum RRSP contribution limits under the Income Tax Act. As of January 1, 2011, our board of directors approved 50% matching contributions on employee contributions, up to 4% of the employee's eligible earnings. Our matching contributions to the RRSP and 401(k) Plans for the three and six months ended June 30, 2011 were $390,449 and $756,663, respectively.