Description of Operations and Summary of Significant Accounting Policies - Summary of Activity within Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Receivables [Abstract]
Balance at beginning of period	$ 289	$ 450	$ 288
Charges, net of reversals	(93)	(3)	176
Write-offs	(74)	(158)	(14)
Balance at end of period	$ 122	$ 289	$ 450