Accrued Liabilities (Tables)

3 Months Ended

Mar. 31, 2018

Payables and Accruals [Abstract]

Accrued Liabilities

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

	2018		2017
Accrued salaries, benefits and bonus	$	10,217	$	8,957
Accrued professional, consulting and lobbying fees	4,046		3,870
Accrued warranty expense	559		644
Accrued income and other taxes	8,945		2,558
Other accrued liabilities	11,102		7,473
Accrued liabilities	$	34,869	$	23,502