Quarterly Information (Unaudited)
|12 Months Ended|
Dec. 31, 2017
|Quarterly Financial Information Disclosure [Abstract]|
|Quarterly Information (Unaudited)||
16. Quarterly Information (Unaudited)
The entire disclosure for quarterly financial data. Includes, but is not limited to, tabular presentation of financial information for fiscal quarters, effect of year-end adjustments, and an explanation of matters or transactions that affect comparability of the information.
Reference 1: http://www.xbrl.org/2003/role/presentationRef