Property and Equipment (Tables)

3 Months Ended

Mar. 31, 2018

Property Plant And Equipment [Abstract]

Summary of Property and Equipment

Property and equipment consisted of the following:

	March 31,			December 31,
	2018			2017
	(In thousands)
	(unaudited)
Machinery, manufacturing and demonstration equipment	$	11,189		$	10,866
Computer equipment		2,191			2,187
Furniture		603			598
Leasehold improvements		2,248			2,237
Total property and equipment		16,231			15,888
Accumulated depreciation and amortization		(9,825	)		(9,218	)
Property and equipment, net	$	6,406		$	6,670