Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2016

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,
	2016			2015
	(In thousands)
Computer equipment and purchased software	$	3,489		$	3,564
Machinery and equipment	882			923
Furniture and fixtures	1,290			1,361
Leasehold improvements	3,917			3,838
Total	9,578			9,686
Less accumulated depreciation	(5,562		)	(5,097		)
Property and equipment, net	$	4,016		$	4,589

Advertising expense

Advertising expense was as follows:

	Year ended December 31,
	2016		2015		2014
	(In thousands)
Advertising expense	$	102	$	265	$	344