Accrued Liabilities (Tables)

3 Months Ended

Mar. 31, 2019

Payables and Accruals [Abstract]

Accrued Liabilities

Accrued liabilities consisted of the following at March 31, 2019 and December 31, 2018 (in thousands):

	March 31, 2019		December 31, 2018
Accrued salaries, benefits and bonus	$	13,993	$	19,063
Accrued professional, consulting and lobbying fees	4,476		4,894
Accrued warranty expense	1,027		898
Accrued income and other taxes	4,392		4,167
Other accrued liabilities	12,460		12,070
Accrued liabilities	$	36,348	$	41,092