Discontinued Operations Discontinued Operations - Schedule of Discontinued Operations (Details) - USD ($)		12 Months Ended
	Jul. 06, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Net income (loss) from discontinued operations		$ (255,000)	$ 79,410,000	$ 10,644,000
Stock-based compensation expense		0	1,533,000	1,099,000
Capital expenditures		0	482,000	631,000
Sisd [Member] | Discontinued Operations, Disposed of by Sale [Member]
Revenue		0	23,248,000	59,821,000
Cost of revenue		0	(11,291,000)	(26,953,000)
Research, development, and engineering expenses		0	(2,126,000)	(4,089,000)
Selling, general, and administrative expenses		0	(7,800,000)	(12,968,000)
Foreign currency loss		0	(177,000)	(170,000)
Operating income from discontinued business		0	1,854,000	15,641,000
Gain (loss) on sale of discontinued business	$ 125,357,000	(404,000)	125,357,000	0
Income from discontinued operations before income tax expense		(404,000)	127,211,000	15,641,000
Income tax expense (benefit) on discontinued operations	$ 47,175,000	(149,000)	47,801,000	4,997,000
Net income (loss) from discontinued operations		(255,000)	79,410,000	10,644,000
Stock-based compensation expense		0	1,533,000	1,099,000
Depreciation expense		0	401,000	777,000
Amortization expense		0	165,000	364,000
Capital expenditures		$ 0	$ 482,000	$ 631,000