Income Taxes Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income tax expense	$ 83	$ 1	$ 2
Deferred tax assets recorded	5,000	4,000
Deferred tax assets related to cumulative net operating losses	2,000	3,000
Deferred tax assets related to other losses	3,000	1,000
Valuation allowance	$ 5,000	$ 4,000