pre_text: 7. ACCRUED LIABILITIES Other accrued expenses consisted of the following at December 31, 2019 and 2018 (in thousands): Advances are amounts received from litigation counsel as advanced reimbursement of out-of-pocket expenses expected to be incurred by us. Board compensation of $0.4 million at December 31, 2019 and 2018 represents accrued and unpaid board and committee fees from prior periods. In the first quarter of 2020, current and prior board members agreed to waive unpaid cash fees in exchange for share-based compensation awards with an aggregate grant-date fair value of approximately $0.1 million (see Note 18).
table: 2019 2018
table: Advances 500 -
table: Board compensation 413 413
table: Other accrued expenses 168 150
table: $1,081 $563
question: Analyse this data from a financial earnings document. What is the total amount of the top 2 categories of accrued liabilities in 2019?