SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2018

Accounting Policies [Abstract]

Estimated useful lives of property and equipment

The estimated useful lives are typically as follows:

Computer equipment and purchased software	3 years
Machinery and equipment	3-5 years
Furniture and fixtures	5 years

	December 31,
	2018			2017
	(in thousands)
Computer equipment and purchased software	$	3,167		$	3,206
Machinery and equipment	821			834
Furniture and fixtures	1,113			1,274
Leasehold improvements	3,897			3,920
Total	8,998			9,234
Less accumulated depreciation	(6,655		)	(6,084		)
Property and equipment, net	$	2,343		$	3,150

Advertising expense

Advertising expense was as follows (in thousands):

	Year ended December 31,
	2018		2017		2016
Advertising expense	$	67	$	221	$	102