Stock-based Compensation (Tables)

3 Months Ended

Mar. 31, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Equity awards granted during the period,Grants in Period, Gross [Table Text Block]

The following table summarizes awards granted under the Radisys Corporation 2007 Stock Plan (in thousands):

	Three Months Ended
	March 31,
	2018	2017
Stock options	2,775	—
Restricted stock units	—	467
Performance-based restricted stock awards (A)	—	670
Total	2,775	1,137

(A) On March 10, 2017, the Compensation Committee approved grants of performance-based restricted stock units ("PRSUs") to certain employees. The awards will vest only on satisfaction of certain performance criteria during two separate annual performance periods and a portion of the award earned will vest upon satisfaction of a time-based service component. 50% of the awards can be earned by meeting strategic revenue targets in fiscal year 2017 and 50% can be earned by meeting strategic revenue targets in fiscal year 2018. One-half of any PRSUs earned during each performance period will vest upon meeting the performance criteria, and the remaining half will be subject to a further time-based service component and will vest one year after meeting the targets. By meeting the relevant performance criteria set forth in the award agreement, employees can earn 0%, 75%, 100% or 125% of the award during each performance period.  If an employee earns less than 100% of the award for the 2017 performance period, the employee is eligible to earn the remaining portion of the award in fiscal year 2018 if cumulative 2017 and 2018 strategic revenue targets are met in the two year period.  Shares are presented based on attainment of 0% of the performance goals being met. At attainment of 125%, the amount of shares eligible to be earned is 418,334.

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]

Stock-based compensation was recognized and allocated as follows (in thousands):

	Three Months Ended
	March 31,
	2018		2017
Cost of sales	$	30	$	97
Research and development	61		230
Selling, general and administrative	253		827
Total	$	344	$	1,154