Summary of Significant Accounting Policies - Long-Lived Assets (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Impairment charge of long-lived assets related to continuing operations	$ 0	$ 0	$ 212,000
mpairment charge of long-lived assets related to discontinued operations		$ 40,000	100,000
Software [Member]
Property, Plant and Equipment [Line Items]
Impairment charge of long-lived assets related to continuing operations			$ 200,000