pre_text: NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (in thousands, except for share and per share data) NOTE 9 — Accrued Expenses and Other Liabilities The components of accrued expenses and other liabilities are as follows:
table: As of December 31,
table: 2019 2018
table: Accrued product-related costs $4,464 $4,377
table: Accrued income taxes 7,903 6,914
table: Accrued property and other taxes 1,574 1,976
table: Accrued professional fees 1,599 3,350
table: Contract liabilities 2,877 1,981
table: Dividends payable 1,299 1,310
table: Remediation reserves 11,444 11,274
table: Other accrued liabilities 5,218 6,165
table: Total accrued expenses and other liabilities $36,378 $37,347
question: Analyse this data from a financial earnings document. What was the change in contract liabilities between 2018 and 2019?