Table:
Year Ended	Year Ended

Stock-Based Compensation by Type of Award	December 31, 2019	December 31, 2018

Stock options	$2,756	$2,926

RSUs	955	1,129

Total stock-based compensation expense	$3,711	$4,055

Answer the following question drawing on both the table and the accompanying text, answer the question. You may include your reasoning, but be sure to finish with a JSON block exactly like {"answer": ["ANSWER"], "scale": "SCALE"} (leave "scale" empty if not applicable).

Supporting text:
Stock-based compensation expense is included in general and administrative expense for each period as follows:
As of December 31, 2019, there was $4,801 of unrecognized stock-based compensation expense related to unvested employee stock options and $1,882 of unrecognized stock-based compensation expense related to unvested RSUs. These costs are expected to be recognized over a weighted-average period of 2.13 and 2.33 years, respectively.

Question: What was the percentage change in the amount of RSUs in 2019 from 2018?

((955 - 1,129)/1,129 ) * 100, therefore {"answer": "-15.41", "scale": "percent"}