Quarterly report pursuant to Section 13 or 15(d)

Employee Benefit Plans

Employee Benefit Plans
3 Months Ended
Mar. 31, 2018
Postemployment Benefits [Abstract]  
Compensation and Employee Benefit Plans [Text Block]
10. Employee Benefit Plans
The Company has an employee benefit plan for its United States-based employees under Section 401(k) of the Internal Revenue Code. The Plan allows all eligible employees to make contributions up to a specified percentage of their compensation. Under the Plan, the Company may, but is not obligated to, match a portion of the employee contribution up to a defined maximum. The Company made no matching contribution for the three months ended March 31, 2018 and 2017.