XML 21 R11.htm IDEA: XBRL DOCUMENT

Allowance for Doubtful Accounts	6 Months Ended
Allowance for Doubtful Accounts	Jun. 30, 2018
Receivables [Abstract]
Allowance for Doubtful Accounts	Allowance for Doubtful Accounts The Company maintains an allowance for doubtful accounts at a level believed to be adequate to absorb estimated probable losses. That estimate is based on past loss experience, current economic and market conditions and other relevant factors. The allowance for doubtful accounts was $0.2 million and $0.2 million as of June 30, 2018 and December 31, 2017, respectively.