Balance Sheet Details - (Tables)

3 Months Ended

Mar. 31, 2015

Balance Sheet Detail [Abstract]

Schedule of Inventory, Current [Table Text Block]

Inventories

Inventories are comprised of the following:

	March 31, 2015		December 31, 2014
Materials	$	33,611	$	29,092
Work-in-process	21,480		20,424
Finished goods	12,964		13,828
Total inventories	$	68,055	$	63,344

Property, Plant and Equipment [Table Text Block]

Property, Plant and Equipment

Property, plant and equipment, net is comprised of the following:

	March 31, 2015		December 31, 2014
Land and building	$	5,024	$	5,024
Machinery and equipment	21,213		20,277
Furniture and fixtures	3,387		3,387
Computer equipment	5,800		5,819
Leasehold improvements	7,780		7,774
	43,204		42,281
Less: Accumulated depreciation	30,144		29,343
Total property, plant and equipment, net	$	13,060	$	12,938

Schedule of Other Assets [Table Text Block]

Other assets

Other assets is comprised of the following:

	March 31, 2015		December 31, 2014
Deferred income taxes	$	30,348	$	30,348
Other	1,257		1,493
Total other assets	$	31,605	$	31,841

Other Current liabilities [Table Text Block]

Other current liabilities

Other current liabilities is comprised of the following:

	March 31, 2015		December 31, 2014
Litigation accrual	$	3,252	$	3,252
Deferred revenue	7,840		7,976
Contingent consideration - acquisitions	795		1,267
Other	5,467		5,624
Total other current liabilities	$	17,354	$	18,119

Other Non-current liabilities [Table Text Block]

Other non-current liabilities

Other non-current liabilities is comprised of the following:

	March 31, 2015		December 31, 2014
Unrecognized tax benefits (including interest)	$	3,196	$	3,178
Contingent consideration - acquisitions	3,873		3,797
Other	2,122		1,695
Total other non-current liabilities	$	9,191	$	8,670