Accrued liabilities as of April 30, 2016 and October 31, 2015 consisted of the following:



	April 30, 2016		October 31, 2015
Accrued payroll and employee benefits	$	3,797	$	3,914
Accrued product warranty cost ⁽¹⁾	713		964
Accrued material purchase ⁽²⁾	11,780		7,568
Accrued service agreement costs ⁽³⁾	6,133		3,437
Accrued taxes, legal, professional and other	3,413		3,292
Accrued liabilities	$	25,836	$	19,175


(1)	Activity in the accrued product warranty costs for the six months ended April 30, 2016 included additions for estimates of future warranty obligations of $0.2 million on contracts in the warranty period and reductions related to actual warranty spend of $0.4 million as contracts progress through the warranty period or are beyond the warranty period.


(2)	The Company acts as a procurement agent for POSCO Energy under an Integrated Global Supply Chain Agreement whereby the Company procures materials on POSCO's behalf for their Asian production facility. This liability represents amounts received for the purchase of materials on behalf of POSCO. Amounts due to vendors is recorded as Accounts payable.

(3)

Activity in service agreement costs represents an increase in loss accruals on service contracts of $1.9 million from $0.8 million as of October 31, 2015 to $2.7 million as of April 30, 2016. The increase relates to renewals of legacy service contracts. The accruals for performance guarantees also increased from $2.6 million as of October 31, 2015 to $3.4 million at April 30, 2016 based on the minimum output falling below the contract requirements for certain contracts.