Balance Sheet Details - (Tables)

3 Months Ended

Mar. 31, 2017

Balance Sheet Detail [Abstract]

Schedule of Inventory, Current [Table Text Block]

Inventories are comprised of the following:

	March 31, 2017		December 31, 2016
Materials	$	34,158	$	32,993
Work-in-process	21,064		18,764
Finished goods	11,004		13,728
Total inventories	$	66,226	$	65,485

Property, Plant and Equipment [Table Text Block]

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

	March 31, 2017			December 31, 2016
Land and building	$	2,584		$	2,584
Machinery and equipment	24,253			23,493
Furniture and fixtures	2,771			2,699
Computer equipment and software	5,422			5,204
Leasehold improvements	8,471			8,116
	43,501			42,096
Accumulated depreciation	(31,172		)	(30,238		)
Total property, plant and equipment, net	$	12,329		$	11,858

Schedule of Other Assets [Table Text Block]

Other assets is comprised of the following:

	March 31, 2017		December 31, 2016
Deferred income taxes	$	30,826	$	30,850
Other	591		593
Total other assets	$	31,417	$	31,443

Other Current liabilities [Table Text Block]

Other current liabilities is comprised of the following:

	March 31, 2017		December 31, 2016
Intangible asset acquisition - Stella Alliance	$	1,000	$	1,000
Contingent consideration - acquisitions	634		855
Warrant settlement payable	—		1,025
Customer deposits	915		996
Other	3,260		3,263
Total other current liabilities	$	5,809	$	7,139

Other Non-current liabilities [Table Text Block]

Other non-current liabilities is comprised of the following:

	March 31, 2017		December 31, 2016
Unrecognized tax benefits (including interest)	$	3,410	$	3,386
Contingent consideration - acquisitions	2,749		2,396
Deferred revenue	1,197		1,132
Other	2,679		2,088
Total other non-current liabilities	$	10,035	$	9,002