Accrued Expenses

12 Months Ended

Dec. 31, 2018

Accrued Expenses [Abstract]

Accrued Expenses

7.  Accrued Expenses

Accrued expenses consisted of the following (in thousands):

	December 31,
	2018		2017
Compensation expense	$	938	$	685
Accrued clinical		156		21
Professional fees		274		211
Supplies		53		65
Other		—		52
	$	1,421	$	1,034