XML 21 R6.htm IDEA: XBRL DOCUMENT v3.8.0.1

Statements of Operations (Parenthetical)	Dec. 31, 2017
ReceivedIn Kind Interest Percentage	5.00%

X

- Definition

The percentage of interest income received in kind of total interest received during the period.

+ References

No definition available.

+ Details

Name:	unl_ReceivedinKindInterestPercentage
Namespace Prefix:	unl_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant