Table:
2019	2018

Prepaid services	$221	$252

Prepaid bonds for German statutory costs	188	199

Prepaid insurance	62	19

Prepaid licenses, software tools and support	17	51

Other prepaid expenses	17	17

$505	$538

Answer the following question using both the table and the accompanying text, produce your answer and, if helpful, briefly explain your calculation. Conclude with JSON: {"answer": ["ANSWER"], "scale": "SCALE"} ("scale" = "" if no unit).

Text:
4. PREPAID EXPENSES
Prepaid expenses consisted of the following at December 31, 2019 and 2018 (in thousands):  Prepaid expenses consisted of the following at December 31, 2019 and 2018 (in thousands):  Prepaid expenses consisted of the following at December 31, 2019 and 2018 (in thousands):
In 2018, we recorded impairment charges of approximately$0.4 million related to prepaid licenses and production tooling as a result of the restructuring of our operations. These charges are included in “Restructuring expenses” in the accompanying statements of comprehensive loss (see Note 15).

Question: What is the % change in the prepaid services amount from 2018 to 2019?

((221 - 252) / 252 ) * 100, therefore {"answer": "-12.3", "scale": "percent"}