Basis of Presentations and Summary of Significant Accounting Policies - Allowance for Doubtful Accounts Activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance at beginning of period	$ 218	$ 340	$ 369
Charged to costs and expenses	52		61
Write-offs, net of recoveries	(73)	(122)	(90)
Balance at end of period	$ 197	$ 218	$ 340