Accrued Liabilities (Tables)

12 Months Ended

Dec. 31, 2016

Payables and Accruals [Abstract]

Accrued Liabilities

Accrued liabilities consisted of the following at December 31 (in thousands):

	2016		2015
Accrued salaries, benefits and bonus	$	6,474	$	3,637
Accrued professional, consulting and lobbying	3,673		1,098
Accrued warranty expense	780		314
Accrued income and other taxes	4,581		1,215
Other accrued expenses	2,740		2,379
Accrued liabilities	$	18,248	$	8,643