Accrued Liabilities (Tables)

6 Months Ended

Jun. 30, 2018

Payables and Accruals [Abstract]

Accrued Liabilities

Accrued liabilities consisted of the following at June 30, 2018 and December 31, 2017 (in thousands):

	2018		2017
Accrued salaries, benefits and bonus	$	12,527	$	8,957
Accrued professional, consulting and lobbying fees	2,683		3,870
Accrued warranty expense	505		644
Accrued income and other taxes	2,894		2,558
Other accrued liabilities	11,386		7,473
Accrued liabilities	$	29,995	$	23,502