Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 28,563	$ 9,213
Restricted cash	0	500
Royalty income receivable	9,217	10,043
Royalty income receivable—related party	6,951	3,470
Other current assets	208	187
Total current assets	44,939	23,413
Property and equipment
Oil and natural gas interests, full cost method of accounting ($254,303 and $252,232 excluded from depletion at March 31, 2017 and December 31, 2016, respectively)	769,393	760,818
Accumulated depletion and impairment	(156,795)	(148,948)
Oil and natural gas interests, net	612,598	611,870
Other assets	35,053	35,266
Total assets	692,590	670,549
Current liabilities:
Accounts payable	31	1,780
Other accrued liabilities	841	371
Total current liabilities	872	2,151
Long-term debt	0	120,500
Total liabilities	872	122,651
Commitments and contingencies
Unitholders’ equity:
Common units (97,575,356 units issued and outstanding as of March 31, 2017 and 87,800,356 units issued and outstanding as of December 31, 2016 )	691,718	547,898
Total unitholders’ equity	691,718	547,898
Total liabilities and unitholders’ equity	$ 692,590	$ 670,549

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

Name:	us-gaap_AccountsPayableCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.