Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases

Future minimum lease payments under non-cancellable operating leases that have initial or remaining lease terms in excess of one year as of December 31, 2017 are as follows:

Year of Payment	Amount
2018	$	749
2019	713
2020	202
Total	$	1,664

Schedule of Future Minimum Lease Payments for Capital Leases

The future minimum lease income under this non-cancellable sublease as of December 31, 2017 is as follows:

Year of Payment	Amount
2018	$	155
2019	155
Total	$	310

Schedule of Product Warranty Liability

Changes in the warranty liability from continuing operations in 2017, 2016 and 2015 are summarized below:

	2017		2016			2015
Aggregate product warranty liability at beginning of year	$	159	$	268		$	268
Net aggregate expense (income) related to product warranties	—		(109		)	8
Aggregate reductions for payments	—		—			(8		)
Aggregate product warranty liability at end of year	$	159	$	159		$	268