Accrued Liabilities (Tables)

3 Months Ended

Mar. 31, 2018

Payables and Accruals [Abstract]

Summary of Accrued Liabilities

Accrued liabilities consists of the following:

	March 31,		December 31,
(in thousands)	2018		2017
Accrued payroll	$	4,647	$	6,201
Product warranty, current	3,495		3,589
Income tax payable	1,341		931
Other accrued expenses	2,387		1,929
	$	11,870	$	12,650