pre_text: Prepaid expenses and other current assets Prepaid expenses and other current assets consisted of the following at December 31, 2019 and 2018 (in thousands): (1) In November 2014 and February 2016, we entered into a term loan agreement and a convertible loan agreement, respectively, with Clean Energy Collective, LLC (“CEC”). Our term loan bears interest at 16% per annum, and our convertible loan bears interest at 10% per annum. In November 2018, we amended the terms of the loan agreements to (i) extend their maturity to June 2020, (ii) waive the conversion features on our convertible loan, and (iii) increase the frequency of interest payments, subject to certain conditions. In January 2019, CEC finalized certain restructuring arrangements, which resulted in a dilution of our ownership interest in CEC and the loss of our representation on the company’s board of managers. As a result of such restructuring, CEC no longer qualified to be accounted for under the equity method. As of December 31, 2019, the aggregate balance outstanding on the loans was $23.9 million and was presented within “Prepaid expenses and other current assets.” As of December 31, 2018, the aggregate balance outstanding on the loans was $22.8 million and was presented within “Notes receivable, affiliate.” (2) See Note 9. “Derivative Financial Instruments” to our consolidated financial statements for discussion of our derivative instruments.
table: 2019 2018
table: Prepaid expenses $137,927 $90,981
table: Prepaid income taxes . 47,811 59,319
table: Indirect tax receivables . 29,908 26,327
table: Restricted cash 13,697 19,671
table: Notes receivable (1) 23,873 5,196
table: Derivative instruments (2) . 1,199 2,364
table: Other current assets 22,040 39,203
table: Prepaid expenses and other current assets $276,455 $243,061
question: Analyse this data from a financial earnings document. What is the difference between notes receivables from 2018 to 2019?