Accounts Receivable (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for doubtful accounts, beginning	$ 303	$ 438
Provision for losses on accounts receivable	83	22	$ 232
Write-offs and recoveries	(117)	(157)
Allowance for doubtful accounts, ending	$ 269	$ 303	$ 438