pre_text: The following table summarizes activity for the interest rate swap: There were no transfers between Level 1, Level 2 or Level 3 fair value hierarchy categories of financial instruments in the years ended December 31, 2019 and 2018. Financial Instruments Not Recorded at Fair Value on a Recurring Basis Some of the Company’s financial instruments are not measured at fair value on a recurring basis but are recorded at amounts that approximate fair value due to their liquid or short-term nature. Such financial assets and financial liabilities include: cash and cash equivalents, restricted cash, net receivables, certain other assets, accounts payable, accrued price protection liability, accrued expenses, accrued compensation costs, and other current liabilities. The Company’s long-term debt is not recorded at fair value on a recurring basis, but is measured at fair value for disclosure purposes (Note8 ).
table: Fair Value at December 31,
table: 2019 2018
table: (in thousands)
table: Interest rate swap
table: Beginning balance $1,623 $734
table: Unrealized gain (loss) recognized in other comprehensive income (loss) (1,660) 889
table: Ending balance $(37) 1,623
question: Analyse this data from a financial earnings document. What was the change in the ending balance from 2018 to 2019?