Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2016

Commitments and Contingencies Disclosure [Abstract]

Schedule of Warranty Activity

Warranty activity, included in accrued expenses in our consolidated balance sheets, for 2016, 2015 and 2014 consists of the following (in thousands):

	2016			2015			2014
Beginning balance	$	474		$	460		$	328
Additions	1,399			667			388
Charges	(663		)	(653		)	(256		)
Ending balance	$	1,210		$	474		$	460

Schedule of Annual Minimum Operating Lease Payments

The approximate annual minimum lease payments over the next five years under the operating leases as of December 31, 2016 are (in thousands):

2017	$	770
2018	786
2019	803
2020	808
2021 and thereafter	458
	$	3,625