Accrued Liabilities (Tables)

6 Months Ended

Jun. 30, 2019

Payables and Accruals [Abstract]

Accrued Liabilities

Accrued liabilities consisted of the following at June 30, 2019 and December 31, 2018 (in thousands):

	June 30, 2019		December 31, 2018
Accrued salaries, benefits and bonus	$	15,106	$	19,063
Accrued professional, consulting and lobbying fees	4,688		4,894
Accrued warranty expense	1,282		898
Accrued income and other taxes	3,448		4,167
Other accrued liabilities	9,487		12,070
Accrued liabilities	$	34,011	$	41,092