Accrued Expenses (Tables)

12 Months Ended

Dec. 31, 2018

Payables And Accruals [Abstract]

Schedule of Accrued Expenses

Accrued expenses consisted of the following (in thousands):

	December 31,
	2018		2017
Compensation and related benefits	$	1,734	$	236
Accrued warranty (Note 6)		112		87
Accrued services		963		1
Accrued expenses	$	2,809	$	324