Hallador Energy (HNRG) 10-Q 6 May 19 2019 Q1 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	3 Months Ended
	Mar. 31, 2019	May 03, 2019
Document and Entity Information [Abstract]
Entity Registrant Name	HALLADOR ENERGY COMPANY
Document Type	10-Q
Current Fiscal Year End Date	--12-31
Entity Common Stock, Shares Outstanding		30,244,599
Entity Current Reporting Status	Yes
Trading Symbol	HNRG
Amendment Flag	false
Entity Central Index Key	0000788965
Entity Filer Category	Accelerated Filer
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 8,690	$ 15,502
Restricted cash (Note 7)	4,657	4,592
Certificates of deposit	488	488
Marketable securities	2,047	1,842
Accounts receivable	15,502	18,428
Prepaid income taxes	1,266	2,606
Inventory	23,181	20,507
Parts and supplies, net of allowance of $994 and $1,595, respectively	10,729	9,645
Prepaid expenses	9,667	11,368
Total current assets	76,227	84,978
Property, plant and equipment, at cost:
Land and mineral rights	131,138	130,897
Buildings and equipment	376,265	365,481
Mine development	142,224	140,990
Total property, plant and equipment, at cost	649,627	637,368
Less - accumulated DD&A	(236,440)	(224,730)
Total property, plant and equipment, net	413,187	412,638
Other assets (Note 7)	14,123	14,217
Total assets	507,169	515,499
Current liabilities:
Current portion of bank debt, net (Note 3)	27,230	25,392
Accounts payable and accrued liabilities (Note 6)	29,527	26,421
Total current liabilities	56,757	51,813
Long-term liabilities:
Bank debt, net (Note 3)	134,348	155,655
Deferred income taxes	26,634	26,441
Asset retirement obligations (ARO)	14,777	14,586
Other	9,526	8,130
Total long-term liabilities	185,285	204,812
Total liabilities	242,042	256,625
Redeemable non-controlling interests (Note 14)	4,000	4,000
Stockholders' equity:
Common stock, $.01 par value, 100,000 shares authorized; 30,245 and 29,955 shares outstanding, respectively	302	302
Additional paid-in capital	101,236	100,742
Retained earnings	159,589	153,830
Total stockholders' equity	261,127	254,874
Total liabilities , redeemable noncontrolling interests, and stockholders' equity	507,169	515,499
Sunrise Energy [Member]
Property, plant and equipment, at cost:
Investment in subsidiaries	$ 3,632	$ 3,666

Consolidated Balance Sheet (Par

Consolidated Balance Sheet (Parentheticals) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Allowance for parts and supplies	$ 994	$ 1,595
Preferred stock, par value (in dollars per share)	$ 0.10	$ 0.10
Preferred stock, authorized	10,000,000	10,000,000
Preferred stock, issued	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, outstanding	30,245,000	30,245,000

Consolidated Statement of Compr

Consolidated Statement of Comprehensive Income - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Revenue:
Revenue		$ 89,313	$ 66,864
Operating Costs and expenses:
Operating costs and expenses		62,419	46,640
DD&A		11,738	10,829
ARO accretion		309	282
Exploration costs		280	217
SG&A		2,984	3,890
Interest	[1]	4,619	2,708
Total costs and expenses		82,349	64,566
Income before income taxes		6,964	2,298
Income tax expense (benefit)
Current		(229)	(203)
Deferred		193	369
Total income tax expense (benefit)		(36)	166
Net income		$ 7,000	$ 2,132
Net income per share: (Note 9)
Basic and diluted (in Dollars per share)		$ 0.23	$ 0.07
Weighted average shares outstanding:
Basic and diluted (in Shares)		30,245	29,955
Coal Sales [Member]
Revenue:
Revenue		$ 85,235	$ 66,787
Other Revenue [Member]
Revenue:
Revenue		$ 4,078	$ 77
[1]	Interest expense for the three months ended March 31, 2019 and 2018 includes $1,013 and $(158), respectively, for the net change in the estimated fair value of our interest rate swaps.

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Parentheticals) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Increase (decrese) interest expense, interest rate swaps	$ 1,013	$ (158)

Consolidated Statement of Cash

Consolidated Statement of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018
Operating activities:
Cash provided by operating activities	$ 20,847	$ 13,193
Investing activities:
Capital expenditures	(8,840)	(10,428)
Proceeds from sale of royalty interests in oil properties	2,500
Proceeds from sale of business		8,000
Cash used in investing activities	(6,340)	(2,428)
Financing activities:
Payments of bank debt	(20,013)	(16,255)
Bank borrowings		5,000
Proceeds from noncontrolling interests (Note 15)		4,000
Taxes paid on vesting of RSUs		(4)
Dividends	(1,241)	(1,236)
Cash used in financing activities	(21,254)	(8,495)
Increase (decrease) in cash, cash equivalents, and restricted cash	(6,747)	2,270
Cash, cash equivalents, and restricted cash beginning of year	20,094	16,294
Cash, cash equivalents, and restricted cash end of year	13,347	18,564
Cash, cash equivalents, and restricted cash consists of the following:
Cash			$ 8,690	$ 15,502	$ 14,449
Restricted cash			4,657	4,592	4,115
Cash, cash equivalents, and restricted cash, Total	20,094	16,294	$ 13,347	$ 20,094	$ 18,564
Supplemental cash flow information:
Capital expenditures included in accounts payable	3,250	$ (3,903)
Right-to-use asset due to adoption of ASU 2016-02	$ 426

Consolidated Statement of Stock

Consolidated Statement of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Balance at Dec. 31, 2017	$ 299	$ 97,873	$ 150,236	$ 915	$ 249,323
Balance (in Shares) at Dec. 31, 2017	29,955
Stock-based compensation		1,972			1,972
Stock issued on vesting of RSUs (in Shares)	2
Taxes paid on vesting of RSUs		(4)			(4)
Taxes paid on vesting of RSUs (in Shares)	1
Dividends			(1,236)		(1,236)
Net income			2,132		2,132
Balance at Mar. 31, 2018	$ 299	99,841	152,047		252,187
Balance (in Shares) at Mar. 31, 2018	29,956
Impact from adoption of new accounting standards			915	$ (915)
Balance at Dec. 31, 2018	$ 302	100,742	153,830		254,874
Balance (in Shares) at Dec. 31, 2018	30,245
Stock-based compensation		494			494
Dividends			(1,241)		(1,241)
Net income			7,000		7,000
Balance at Mar. 31, 2019	$ 302	$ 101,236	$ 159,589		$ 261,127
Balance (in Shares) at Mar. 31, 2019	30,245

General Business

General Business	3 Months Ended
	Mar. 31, 2019
General Business [Abstract]
General Business	(1) GENERAL BUSINESS  The interim financial data is unaudited; however, in our opinion, it includes all adjustments, consisting only of normal recurring adjustments necessary for a fair statement of the results for the interim periods. The condensed consolidated financial statements included herein have been prepared pursuant to the SEC’s rules and regulations; accordingly, certain information and footnote disclosures normally included in GAAP financial statements have been condensed or omitted.  The results of operations and cash flows for the three months ended March 31, 2019 are not necessarily indicative of the results to be expected for future quarters or for the year ending December 31, 2019. To maintain consistency and comparability , certain 2018 amounts have been reclassified to conform to the 2019 presentation.  Our organization and business, the accounting policies we follow and other information, are contained in the notes to our condensed consolidated financial statements filed as part of our 2018 Form 10-K. This quarterly report should be read in conjunction with such 10-K.  The condensed consolidated financial statements include the accounts of Hallador Energy Company (hereinafter known as, “we, us, or our”) and its wholly-owned subsidiaries Sunrise Coal, LLC (Sunrise) and Hourglass Sands, LLC (Hourglass), and Sunrise’s wholly-owned subsidiaries. All significant intercompany accounts and transactions have been eliminated . Sunrise is engaged in the production of steam coal from mines located in western Indiana. Hourglass is in the development stage and is engaged in the production of frac sand in the State of Colorado (see Note 14).  New Accounting Standards Issued and Adopted  In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) (ASU 2016-02). ASU 2016-02 increases transparency and comparability among organizations by requiring lessees to record right-to-use assets and corresponding lease liabilities on the balance sheet and disclose key information about lease arrangements. The new guidance classifies leases as either finance or operating, with classification affecting the pattern of income recognition in the statement of income. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, with early adoption permitted. The FASB issued clarifications, updates and implementation guidance to ASU 2016-02, such as ASU 2018-11, Leases (Topic 842) (ASU 2018-11) which provides practical expedients for transition to Topic 842. ASU 2018-11 provides an option to apply the transition provisions of the new standard at its adoption date instead of at the earliest comparative period presented and permits lessors to not separate non-lease components from the associated lease component if certain conditions are met.  We adopted ASU 2016-02 effective January 1, 2019 and elected the option to not restate comparative periods in transition and also elected the practical expedients within the standard which permits us to not reassess our prior conclusions about lease identification, lease classification and initial direct costs. Additionally, the Company made an election to not separate lease and non-lease components for all leases and will not use hindsight. The adoption of the standard had no impact on the Company’s consolidated income statement or statement of cash flows. Effective January 1, 2019, we recorded a right-to-use asset and corresponding lease liability of $0.5 million.  New Accounting Standards Issued and Not Yet Adopted  In June 2016, the FASB issued ASU 2016-13, Financial Instruments–Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (ASU 2016-13). ASU 2016-13 changes the impairment model for most financial assets and certain other instruments to require the use of a new forward-looking "expected loss" model that generally will result in earlier recognition of allowances for losses. The new standard will require disclosure of significantly more information related to these items. ASU 2016-13 is effective for fiscal years beginning after December 15, 2019, and interim periods within those fiscal years, with early adoption permitted for the fiscal year beginning after December 15, 2018, including interim periods. We are currently evaluating the effect of adopting ASU 2016-13, but do not anticipate it will have a material impact on our condensed consolidated financial statements. 

Asset Impairment Review

Asset Impairment Review	3 Months Ended
	Mar. 31, 2019
Asset Impairment Review [Abstract]
Asset Realization	(2 ) ASSET IMPAIRMENT REVIEW  Bulldog Reserves In October 2017, we entered into an agreement to sell land associated with the Bulldog Mine for $4.9 million . As part of the transaction, we hold the rights to repurchase the property for eight years at the original sale price of $4.9 million plus interest. We are accounting for the sale as a financing transaction with the liability recorded in other long-term liabilities. The Bulldog Mine assets had an aggregate net carrying value of $15 million at March 31, 2019. Also, in October 2017, the Illinois Department of Natural Resources (ILDNR) notified us that our mine application, along with modifications, was acceptable. In October 2018, we paid the required fee and bond and the permit was issued in April 2019. We have determined that no impairment is necessary. If estimates inherent in the assessment change, it may result in future impairment of the assets.

Bank Debt

Bank Debt	3 Months Ended
	Mar. 31, 2019
Bank Debt [Abstract]
Bank Debt	 (3) BANK DEBT  Our bank debt is comprised of term debt and a $120 million revolver, both of which mature May 21, 2022 . Our debt is recorded at cost which approximates fair value due to the variable interest rates in the agreement and is collateralized primarily by Hallador’s assets.  Liquidity  Our bank debt at March 31, 2019, was $ 168 million (term - $ 125 million, revolver - $ 43 million). As of March 31, 2019, we had additional borrowing capacity of $ 77 million and total liquidity of $ 88 million.  Fees  Unamortized bank fees and other costs incurred in connection with the initial facility and a subsequent amendment totaled $ 8.8 million as of our most recent amendment in May 2018. These costs were deferred and are being amortized over the term of the loan. Unamortized costs as of March 31, 2019 and December 31, 2018 were $ 6.9 million and $ 7.4 million, respectively.  Bank debt, less debt issuance costs, is presented below (in thousands):     2019 2018  Current bank debt $ 29,400 $ 27,563  Less unamortized debt issuance cost (2,170) (2,171)  Net current portion $ 27,230 $ 25,392   Long-term bank debt $ 139,050 $ 160,900  Less unamortized debt issuance cost (4,702) (5,245)  Net long-term portion $ 134,348 $ 155,655   Total bank debt $ 168,450 $ 188,463  Less total unamortized debt issuance cost (6,872) (7,416)  Net bank debt $ 161,578 $ 181,047     Covenants  The credit facility includes a Maximum Leverage Ratio (consolidated funded debt / trailing twelve months adjusted EBITDA), calculated as of the end of each fiscal quarter for the trailing twelve months, not to exceed the amounts below:  Fiscal Periods Ending Ratio  March 31, 2019 3.75 to 1.00  June 30, 2019 and September 30, 2019 3.50 to 1.00  December 31, 2019 through September 30, 2020 3.25 to 1.00  December 31, 2020 through September 30, 2021 3.00 to 1.00  December 31, 2021 and each fiscal quarter thereafter 2.75 to 1.00  As of March 31, 2019, our Leverage Ratio was 2. 12 , easily within our compliance limit of 3.75 .  The credit facility also requires a Minimum Debt Service Coverage Ratio (consolidated adjusted EBITDA / annual debt service) calculated as of the end of each fiscal quarter for the trailing twelve months of 1.25 to 1 through the maturity of the credit facility.  At March 31, 2019, our Debt Service Coverage Ratio was well within compliance at 2. 29 .  Rate  The interest rate on the facility ranges from LIBOR plus 3.00% to LIBOR plus 4.50% , depending on our Leverage Ratio. We entered into swap agreements to fix the LIBOR component of the interest rate to achieve an effective fixed rate of ~6% on the original term loan balance and on $ 53 million of the revolver. At March 31, 2019, we are paying LIBOR of 2.51% plus 4.00% for a total interest rate of 6.51% .  

Equity Method Investments

Equity Method Investments	3 Months Ended
	Mar. 31, 2019
Equity Method Investments [Abstract]
Equity Method Investment	(4) EQUITY METHOD INVESTMENTS  Savoy Energy, L.P.  On March 9, 2018 , we sold our entire 30.6% partnership interest to Savoy for $8 million. Our net proceeds were $7.5 million after commissions paid to a related party, which were applied to our bank debt as required under the agreement. The sale resulted in a loss of $538,000 for the period ended March 31, 2018.  Sunrise Energy, LLC  We own a 50% interest in Sunrise Energy, LLC, which owns gas reserves and gathering equipment with plans to develop and operate such reserves. Sunrise Energy also plans to develop and explore for oil, gas and coal-bed methane gas reserves on or near our underground coal reserves. The carrying value of the investment included in our consolidated balance sheets as of March 31, 2019, and December 31, 2018, was $3.6 million and $3. 7 million, respectively.

Other Assets

Other Assets	3 Months Ended
	Mar. 31, 2019
Other Assets [Abstract]
Other Assets	(5) OTHER ASSETS (in thousands)    March 31, December 31,  2019 2018  Advanced coal royalties $ 9,903 $ 10,186  Marketable equity securities available for sale at fair value (restricted)* 2,113 1,909  Other 2,107 2,122  Total other assets $ 14,123 $ 14,217  ____________________ * Held by Sunrise Indemnity, Inc., our wholly-owned captive insurance company .

Accounts Payable and Accrued Li

Accounts Payable and Accrued Liabilities	3 Months Ended
	Mar. 31, 2019
Accounts Payable and Accrued Liabilities [Abstract]
Accounts Payable and Accrued Liabilities	(6) ACCOUNTS PAYABLE AND ACCRUED LIABILITIES (in thousands)    March 31, December 31,  2019 2018  Accounts payable $ 7,079 $ 5,844  Goods received not yet invoiced 6,982 6,095  Accrued property taxes 3,149 2,763  Accrued payroll 2,345 1,825  Workers' compensation reserve 3,872 3,670  Group health insurance 2,400 2,200  Other 3,700 4,024  Total accounts payable and accrued liabilities $ 29,527 $ 26,421 

Other Income

Other Income	3 Months Ended
	Mar. 31, 2019
Other Income
Other Income	(7) OTHER INCOME (in thousands)     Three Months Ended  March 31,  2019 2018  Equity loss - Sunrise Energy $ (34 ) $ (83 )  Loss on disposal of Savoy - (538 )  MSHA reimbursements 150 503  Gain on sale of royalty interests in oil properties 2,500 -  Miscellaneous 1,462 195  Total other income $ 4,078 $ 77  

Self Insurance

Self Insurance	3 Months Ended
	Mar. 31, 2019
Self Insurance [Abstract]
Self Insurance	(8) SELF-INSURANCE  We self-insure our underground mining equipment. Such equipment is allocated among ten mining units dispersed over 22 miles. The historical cost of such equipment was approximately $260 million and $255 million as of March 31, 2019 and December 31, 2018, respectively.  Restricted cash of $ 4.7 million and $ 4.6 million as of March 31, 2019 and December 31, 2018, respectively, represents cash held and controlled by a third party and is restricted for future workers’ compensation claim payments.

Net Income per Share

Net Income per Share	3 Months Ended
	Mar. 31, 2019
Net Income per Share [Abstract]
Net Income per Share	(9) NET INCOME PER SHARE  We compute net income per share using the two-class method, which is an allocation formula that determines net income per share for common stock and participating securities, which for us are our outstanding RSUs.  The following table sets forth the computation of net income allocated to common shareholders (in thousands):    Three Months Ended  March 31,  2019 2018 Numerator:  Net income $ 7,000 $ 2,132  Earnings allocated to RSUs (180 ) (50 )  Net income allocated to common shareholders $ 6,820 $ 2,082  

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2019
Income Taxes [Abstract]
Income Taxes	(10) INCOME TAXES  For interim period reporting, we record income taxes using an estimated annual effective tax rate based upon projected annual income, forecasted permanent tax differences, discrete items and statutory rates in states in which we operate. Our effective tax rate for the three months ended March 31, 2019 and 2018 was ~ 0% and ~ 7% , respectively. Historically, our actual effective tax rates have differed from the statutory effective rate primarily due to the benefit received from statutory percentage depletion in excess of tax basis. The deduction for statutory percentage depletion does not necessarily change proportionately to changes in income before income taxes. 

Restricted Stock Units (RSUs)

Restricted Stock Units (RSUs)	3 Months Ended
	Mar. 31, 2019
Restricted Stock Units (RSUs) [Abstract]
Restricted Stock Units (RSUs)	(11 ) RESTRICTED STOCK UNITS (RSUs)   Non-vested grants at December 31, 2018 789,250  Granted - share price on grant date was $ 5.27 8,000  Vested -  Forfeited -  Non-vested grants at March 31, 2019 797,250  No shares vested during the three months ended March 31, 2019 .  For the three months ended March 31, 2019 , and 2018, our stock-based compensation was $0.5 million and $ 2.0 million, respectively. With the passing of our Chairman, Victor Stabio, on March 7, 2018, the vesting of his 220,000 RSUs accelerated. The value of the accelerated RSUs was $1.5 million.  Non-vested RSU grants will vest as follows:   Vesting RSUs Year Vesting  2019 304,750  2020 176,250  2021 316,250  797,250  The outstanding RSUs have a value of $4.0 million based on the May 3 , 2019 , closing stock price of $5.07 .  At March 31, 2019, we had 1,250,466 RSUs available for future issuance. 

Revenue

Revenue	3 Months Ended
	Mar. 31, 2019
Revenue from Contract with Customer [Abstract]
Revenue	( 12) REVENUE  Effective January 1, 2018, we adopted ASU 2014-09. The adoption of this standard did not impact the timing of revenue recognition on our consolidated balance sheets or condensed consolidated statements of comprehensive income.  Revenue from Contracts with Customers  We account for a contract with a customer when the parties have approved the contract and are committed to performing their respective obligations, the rights of each party are identified , payment terms are identified , the contract has commercial substance, and collectability of consideration is probable. We recognize revenue when we satisfy a performance obligation by transferring control of a good or service to a customer.  Our revenue is derived from sales to customers of coal produced at our facilities. Our customers purchase coal directly from our mine sites and our Princeton Loop, where the sale occurs and where title , risk of loss, and control typically pass to the customer at that point. Our customers arrange for and bear the costs of transporting their coal from our mines to their plants or other specified discharge points. Our customers are typically domestic utility companies. Our coal sales agreements with our customers are fixed-priced , fixed-volume supply contracts, or include a predetermined escalation in price for each year. Price re-opener and index provisions may allow either party to commence a renegotiation of the contract price at a pre-determined time. Price re-opener provisions may automatically set a new price based on prevailing market price or, in some instances, require us to negotiate a new price, sometimes within specified ranges of prices. The terms of our coal sales agreements result from competitive bidding and extensive negotiations with customers. Consequently, the terms of these contracts vary by customer.  Coal sales agreements will typically contain coal quality specifications. With coal quality specifications in place, the raw coal sold by us to the customer at the delivery point must be substantially free of magnetic material and other foreign material impurities and crushed to a maximum size as set forth in the respective coal sales agreement. Price adjustments are made and billed in the month the coal sale was recognized based on quality standards that are specified in the coal sales agreement, such as Btu factor, moisture, ash, and sulfur content and can result in either increases or decreases in the value of the coal shipped.  Disaggregation of Revenue  Revenue is disaggregated by primary geographic markets, as we believe this best depicts how the nature, amount, timing, and uncertainty of our revenue and cash flows are affected by economic factors. 72% and 74% of our coal revenue for the three months ended March 31, 2019 and 2018, respectively, was sold to customers in the State of Indiana with the remainder sold to customers in Florida, Georgia, North Carolina, Kentucky, Tennessee, and South Carolina.  Performance Obligations  A performance obligation is a promise in a contract with a customer to provide distinct goods or services. Performance obligations are the unit of account for purposes of applying the revenue recognition standard and therefore determine when and how revenue is recognized. In most of our contracts, the customer contracts with us to provide coal that meets certain quality criteria. We consider each ton of coal a separate performance obligation and allocate the transaction price based on the base price per the contract, increased or decreased for quality adjustments.  We recognize revenue at a point in time as the customer does not have control over the asset at any point during the fulfillment of the contract. For substantially all of our customers, this is supported by the fact that title and risk of loss transfer to the customer upon loading of the truck or railcar at the mine. This is also the point at which physical possession of the coal transfers to the customer, as well as the right to receive substantially all benefits and the risk of loss in ownership of the coal.  We have remaining performance obligations relating to fixed priced contracts of approximately $756 million, which represent the average fixed prices on our committed contracts as of March 31, 2019. We expect to recognize approximately 65% of this revenue through 20 20 , with the remainder recognized thereafter . We have remaining performance obligations relating to index priced contracts or contracts with price reopeners of approximately $330 million, which represents our estimate of the expected re-opener/indexed price on committed contracts as of March 31, 2019. We expect to recognize all of this income beginning in 2020 .  The tons used to determine the remaining performance obligations are subject to adjustment in instances of force majeure and exercise of customer options to either take additional tons or reduce tonnage if such option exists in the customer contract.  Contract Balances  Under ASC 606, the timing of when a performance obligation is satisfied can affect the presentation of accounts receivable, contract assets, and contract liabilities. The main distinction between accounts receivable and contract assets is whether consideration is conditional on something other than the passage of time. A receivable is an entity’s right to consideration that is unconditional. Under the typical payment terms of our contracts with customers, the customer pays us a base price for the coal, increased or decreased for any quality adjustments. Amounts billed and due are recorded as trade accounts receivable and included in accounts receivable in our consolidated balance sheets. We do not currently have any contracts in place where we would transfer coal in advance of knowing the final price of the coal sold, and thus do not have any contract assets recorded. Contract liabilities arise when consideration is received in advance of performance . This deferred revenue is included in accounts payable and accrued liabilities in our consolidated balance sheets when consideration is received, and revenue is not recognized until the performance obligation is satisfied. We are rarely paid in advance of performance and do not currently have any deferred revenue recorded in our consolidated balance sheets. 

Leaes

Leaes	3 Months Ended
	Mar. 31, 2019
Leases [Abstract]
Leases	 (13) Leases  We have operating leases for office space and processing facilities with remaining lease terms ranging from less than 1 year to approximately 4 years. As most of the leases do not provide an implicit rate, we calculated the right-of-use assets and lease liabilities using our secured incremental borrowing rate at the lease commencement date. We currently do not have any finance leases outstanding. Information related to leases was as follows:     Three Months Ended  March 31, 2019  (In thousands)  Operating lease information:  Operating cash flows from operating leases $ 79  Weighted average remaining lease term in years 4.26  Weighted average discount rate 6 %     Future minimum lease payments under non-cancellable leases as of March 31, 2019 were as follows:        Year Amount  (In thousands)  2019 $ 89  2020 99  2021 103  2022 106  2023 72  Total minimum lease payments $ 469  Less imputed interest (43 )   Total operating lease liability $ 426   As reflected on balance sheet:  Other long-term liabilities $ 426  Total operating lease liability $ 426   At March 31, 2019, we had approximately $426 ,000 right-of-use operating lease assets recorded within “buildings and equipment” on the Consolidated Balance Sheet.  

Hourglass Sands

Hourglass Sands	3 Months Ended
	Mar. 31, 2019
Acquisition [Abstract]
Hourglass Sands	 (14) HOURGLASS SANDS  In February 2018 , we invested $4 million in Hourglass Sands, LLC (Hourglass), a permitted frac sand mining company in the State of Colorado. We own 100% of the Class A units and are consolidating the activity of Hourglass in these statements. Class A units are entitled to 100% of profit until our capital investment and interest is returned , then 90% of profits are allocated to us with remainder to Class B units. We do not own any Class B units.  In February 2018 , a Yorktown company associated with one of our directors also invested $4 million in Hourglass in return for a royalty interest in Hourglass. This investment coupled with our $4 million investment brings the initial capitalization of Hourglass to $8 million. We report the royalty interest as a redeemable noncontrolling interest in the consolidated balance sheets. A representative of the Yorktown company holds a seat on the board of managers, and, with a change of control, the Yorktown company may be entitled to receive a portion of the net proceeds realized, as prescribed in the Hourglass operating agreement.  Below are a condensed Hourglass balance sheet as of March 31, 2019 and December 31, 2018 and a condensed statement of operations for the three months ended March 31, 2019 and 2018. Current assets include cash totaling $ 2.3 million and sand inventory totaling $1.6 million as of March 31, 2019. Current assets include cash totaling $2.9 million and sand inventory totaling $1.3 million as of December 31, 2018. Expenses are included in operating costs and expenses, exploration costs, and SG&A in our consolidated statements of comprehensive income.      Condensed Balance Sheet   March 31, December 31,  2019 2018  Current assets $ 3,889 $ 4,241  Property and equipment 3,086 3,092  Total assets $ 6,975 $ 7,333   Total liabilities $ 395 $ 502  Redeemable noncontrolling interests 4,000 4,000  Members' equity 2,580 2,831  Total liabilities and equity $ 6,975 $ 7,333    Condensed Statement of Operations   Three Months Ended  March 31,  2019 2018  Revenue $ 63 $ -  Expenses 314 136  Net loss $ (251 ) $ (136)   

Subsequent Events

Subsequent Events	3 Months Ended
	Mar. 31, 2019
Subsequent Events [Abstract]
Subsequent Events	(15) SUBSEQUENT EVENTS  On April 15, 2019 , we declared a dividend of $.04 per share to shareholders of record as of April 30, 2019 . The dividend is payable on May 17, 2019 . 

General Business (Policy)

General Business (Policy)	3 Months Ended
	Mar. 31, 2019
General Business [Abstract]
New Accounting Pronouncements	New Accounting Standards Issued and Adopted  In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) (ASU 2016-02). ASU 2016-02 increases transparency and comparability among organizations by requiring lessees to record right-to-use assets and corresponding lease liabilities on the balance sheet and disclose key information about lease arrangements. The new guidance classifies leases as either finance or operating, with classification affecting the pattern of income recognition in the statement of income. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, with early adoption permitted. The FASB issued clarifications, updates and implementation guidance to ASU 2016-02, such as ASU 2018-11, Leases (Topic 842) (ASU 2018-11) which provides practical expedients for transition to Topic 842. ASU 2018-11 provides an option to apply the transition provisions of the new standard at its adoption date instead of at the earliest comparative period presented and permits lessors to not separate non-lease components from the associated lease component if certain conditions are met.  We adopted ASU 2016-02 effective January 1, 2019 and elected the option to not restate comparative periods in transition and also elected the practical expedients within the standard which permits us to not reassess our prior conclusions about lease identification, lease classification and initial direct costs. Additionally, the Company made an election to not separate lease and non-lease components for all leases and will not use hindsight. The adoption of the standard had no impact on the Company’s consolidated income statement or statement of cash flows. Effective January 1, 2019, we recorded a right-to-use asset and corresponding lease liability of $0.5 million.  New Accounting Standards Issued and Not Yet Adopted  In June 2016, the FASB issued ASU 2016-13, Financial Instruments–Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (ASU 2016-13). ASU 2016-13 changes the impairment model for most financial assets and certain other instruments to require the use of a new forward-looking "expected loss" model that generally will result in earlier recognition of allowances for losses. The new standard will require disclosure of significantly more information related to these items. ASU 2016-13 is effective for fiscal years beginning after December 15, 2019, and interim periods within those fiscal years, with early adoption permitted for the fiscal year beginning after December 15, 2018, including interim periods. We are currently evaluating the effect of adopting ASU 2016-13, but do not anticipate it will have a material impact on our condensed consolidated financial statements.

Bank Debt (Tables)

Bank Debt (Tables)	3 Months Ended
	Mar. 31, 2019
Bank Debt [Abstract]
Schedule of Debt	Bank debt, less debt issuance costs, is presented below (in thousands):     2019 2018  Current bank debt $ 29,400 $ 27,563  Less unamortized debt issuance cost (2,170) (2,171)  Net current portion $ 27,230 $ 25,392   Long-term bank debt $ 139,050 $ 160,900  Less unamortized debt issuance cost (4,702) (5,245)  Net long-term portion $ 134,348 $ 155,655   Total bank debt $ 168,450 $ 188,463  Less total unamortized debt issuance cost (6,872) (7,416)  Net bank debt $ 161,578 $ 181,047   
Amended Credit Facility Maximum Leverage Ratio	The credit facility includes a Maximum Leverage Ratio (consolidated funded debt / trailing twelve months adjusted EBITDA), calculated as of the end of each fiscal quarter for the trailing twelve months, not to exceed the amounts below:  Fiscal Periods Ending Ratio  March 31, 2019 3.75 to 1.00  June 30, 2019 and September 30, 2019 3.50 to 1.00  December 31, 2019 through September 30, 2020 3.25 to 1.00  December 31, 2020 through September 30, 2021 3.00 to 1.00  December 31, 2021 and each fiscal quarter thereafter 2.75 to 1.00  

Other Assets (Tables)

Other Assets (Tables)	3 Months Ended
	Mar. 31, 2019
Other Assets [Abstract]
Schedule of Other Assets	OTHER ASSETS (in thousands)    March 31, December 31,  2019 2018  Advanced coal royalties $ 9,903 $ 10,186  Marketable equity securities available for sale at fair value (restricted)* 2,113 1,909  Other 2,107 2,122  Total other assets $ 14,123 $ 14,217  ____________________ * Held by Sunrise Indemnity, Inc., our wholly-owned captive insurance company

Accounts Payable and Accrued _2

Accounts Payable and Accrued Liabilities (Tables)	3 Months Ended
	Mar. 31, 2019
Accounts Payable and Accrued Liabilities [Abstract]
Schedule of Accounts Payable and Accrued Liabilities	ACCOUNTS PAYABLE AND ACCRUED LIABILITIES (in thousands)    March 31, December 31,  2019 2018  Accounts payable $ 7,079 $ 5,844  Goods received not yet invoiced 6,982 6,095  Accrued property taxes 3,149 2,763  Accrued payroll 2,345 1,825  Workers' compensation reserve 3,872 3,670  Group health insurance 2,400 2,200  Other 3,700 4,024  Total accounts payable and accrued liabilities $ 29,527 $ 26,421 

Other Income (Tables)

Other Income (Tables)	3 Months Ended
	Mar. 31, 2019
Other Income
Schedule of Other Income	OTHER INCOME (in thousands)     Three Months Ended  March 31,  2019 2018  Equity loss - Sunrise Energy $ (34 ) $ (83 )  Loss on disposal of Savoy - (538 )  MSHA reimbursements 150 503  Gain on sale of royalty interests in oil properties 2,500 -  Miscellaneous 1,462 195  Total other income $ 4,078 $ 77 

Net Income per Share (Tables)

Net Income per Share (Tables)	3 Months Ended
	Mar. 31, 2019
Net Income per Share [Abstract]
Computation of Earnings per Share	 Three Months Ended  March 31,  2019 2018 Numerator: Net income $ 7,000 $ 2,132 Earnings allocated to RSUs (180 ) (50 ) Net income allocated to common shareholders $ 6,820 $ 2,082 

Restricted Stock Units (RSUs) (

Restricted Stock Units (RSUs) (Tables)	3 Months Ended
	Mar. 31, 2019
Restricted Stock Units (RSUs) [Abstract]
Schedule of Restricted Stock Units	 Non-vested grants at December 31, 2018 789,250  Granted - share price on grant date was $ 5.27 8,000  Vested -  Forfeited -  Non-vested grants at March 31, 2019 797,250  
Restricted Stock Unit Vesting	 Non-vested RSU grants will vest as follows:   Vesting RSUs Year Vesting  2019 304,750  2020 176,250  2021 316,250  797,250 

Leaes (Tables)

Leaes (Tables)	3 Months Ended
	Mar. 31, 2019
Leases [Abstract]
Schedule of information related to leases	Information related to leases was as follows:     Three Months Ended  March 31, 2019  (In thousands)  Operating lease information:  Operating cash flows from operating leases $ 79  Weighted average remaining lease term in years 4.26  Weighted average discount rate 6 %  
Schedule of future minimum lease payments and balance sheet locations	Future minimum lease payments under non-cancellable leases as of March 31, 2019 were as follows:        Year Amount  (In thousands)  2019 $ 89  2020 99  2021 103  2022 106  2023 72  Total minimum lease payments $ 469  Less imputed interest (43 )   Total operating lease liability $ 426   As reflected on balance sheet:  Other long-term liabilities $ 426  Total operating lease liability $ 426  

Hourglass Sands (Tables)

Hourglass Sands (Tables) - Hourglass Sands LLC [Member]	3 Months Ended
	Mar. 31, 2019
Business Acquisition [Line Items]
Condensed Balance Sheet	   Condensed Balance Sheet   March 31, December 31,  2019 2018  Current assets $ 3,889 $ 4,241  Property and equipment 3,086 3,092  Total assets $ 6,975 $ 7,333   Total liabilities $ 395 $ 502  Redeemable noncontrolling interests 4,000 4,000  Members' equity 2,580 2,831  Total liabilities and equity $ 6,975 $ 7,333  
Condensed Statement of Operations	 Condensed Statement of Operations   Three Months Ended  March 31,  2019 2018  Revenue $ 63 $ -  Expenses 314 136  Net loss $ (251 ) $ (136)  

General Business (Narrative) (D

General Business (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands	Apr. 15, 2019	Mar. 31, 2019	Mar. 31, 2018	Jan. 01, 2019
Revenue, Major Customer [Line Items]
DD&A		$ 11,738	$ 10,829
Revenue		89,313	$ 66,864
Right-of-use asset		426
Operating lease liabilities		$ 426
Subsequent Event [Member]
Revenue, Major Customer [Line Items]
Dividends payable, amount per share	$ 0.04
Dividends payable, date of record	Apr. 30, 2019
Dividends payable, date to be paid	May 17, 2019
Sunrise Energy [Member]
Revenue, Major Customer [Line Items]
Equity method investment ownership percentage		50.00%
Restatement Adjustment [Member] | Accounting Standards Update 2016-02 [Member]
Revenue, Major Customer [Line Items]
Right-of-use asset				$ 500
Operating lease liabilities				$ 500

Asset Impairment Review (Narrat

Asset Impairment Review (Narrative) (Details) - Bulldog Mine [Member] - USD ($) $ in Thousands	1 Months Ended	3 Months Ended
	Oct. 31, 2017	Mar. 31, 2019
Impairment Effects on Earnings Per Share [Line Items]
Asset impairment		$ 0
Proceeds from Bulldog property	$ 4,900
Period of rights to repurchase the property		P8Y
Assets with repurchase agreement aggregate net carrying value		$ 15,000

Bank Debt (Narrative) (Details)

Bank Debt (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018	May 21, 2018
Debt Instrument [Line Items]
Leverage ratio	212.00%
Debt service coverage ratio	229.00%
Interest rate effective percentage	6.51%
Credit Agreement [Member]
Debt Instrument [Line Items]
Closing costs of debt	$ 8.8
Deferred financing costs expensed	6.9	$ 7.4
Credit agreement, amount outstanding	168
Borrowing capacity	77
Liquidity	$ 88
Debt, interest rate spread on variable rate	4.00%
Interest rate effective percentage	6.00%
Minimum [Member] | Credit Agreement [Member]
Debt Instrument [Line Items]
Debt service coverage ratio	125.00%
London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member] | Credit Agreement [Member]
Debt Instrument [Line Items]
Debt, interest rate spread on variable rate	3.00%
London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member] | Credit Agreement [Member]
Debt Instrument [Line Items]
Debt, interest rate spread on variable rate	4.50%
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Amount of debt with maximum interest rate	$ 53
Revolving Credit Facility [Member] | Credit Agreement [Member]
Debt Instrument [Line Items]
Credit agreement, amount outstanding	$ 43		$ 120
Debt maturity date	May 21, 2022
Term Loan [Member] | Credit Agreement [Member]
Debt Instrument [Line Items]
Credit agreement, amount outstanding	$ 125

Bank Debt (Schedule of Debt) (D

Bank Debt (Schedule of Debt) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018
Bank Debt [Abstract]
Current debt	$ 29,400		$ 27,563
Less debt issuance cost, current	(2,170)		(2,171)
Net current portion	27,230	$ 25,392	25,392
Long-term debt	139,050		160,900
Less debt issuance cost, long-term	(4,702)		(5,245)
Net bank debt	134,348	$ 155,655	155,655
Total bank debt	168,450		188,463
Less debt issuance cost, long-term	(6,872)		(7,416)
Net bank debt	$ 161,578		$ 181,047

Bank Debt (Amended Credit Facil

Bank Debt (Amended Credit Facility Maximum Leverage Ratio) (Details)	Mar. 31, 2019	Sep. 30, 2018
Line of Credit Facility [Line Items]
Leverage Ratio	212.00%
Maximum [Member] | March 31, 2019 [Member]
Line of Credit Facility [Line Items]
Leverage Ratio		375.00%
Maximum [Member] | June 30, 2019 and September 30, 2019 [Member]
Line of Credit Facility [Line Items]
Leverage Ratio		350.00%
Maximum [Member] | December 31, 2019 through September 30, 2020 [Member]
Line of Credit Facility [Line Items]
Leverage Ratio		325.00%
Maximum [Member] | December 31, 2020 through September 30, 2021 [Member]
Line of Credit Facility [Line Items]
Leverage Ratio		300.00%
Maximum [Member] | December 31, 2021 and Each Fiscal Quarter Thereafter [Member]
Line of Credit Facility [Line Items]
Leverage Ratio		275.00%

Equity Method Investments (Narr

Equity Method Investments (Narrative) (Details) - USD ($) $ in Thousands	Mar. 09, 2018	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Savoy [Member]
Schedule of Equity Method Investments [Line Items]
Value of equity method investment sold in period		$ 8,000
Gain (loss) on sale of equity method investment				$ (538)	$ (538)
Sale of Stock, Transaction Date			Mar. 9, 2018
Sale of Stock, Consideration Received on Transaction		$ 7,500
Sale of Stock, Percentage of Ownership before Transaction	30.60%
Sunrise Energy [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment ownership percentage			50.00%
Equity method investment			$ 3,600		$ 3,700

Other Assets (Schedule of Other

Other Assets (Schedule of Other Assets) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Long-term assets:
Advance coal royalties	$ 9,903	$ 10,186
Marketable equity securities available for sale at fair value (restricted)*	2,113	1,909
Other	2,107	2,122
Total other assets	$ 14,123	$ 14,217

Accounts Payable and Accrued _3

Accounts Payable and Accrued Liabilities (Schedule of Accounts Payable and Accrued Liabilities) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Accounts Payable and Accrued Liabilities [Abstract]
Accounts payable	$ 7,079	$ 5,844
Goods received not yet invoiced	6,982	6,095
Accrued property taxes	3,149	2,763
Accrued payroll	2,345	1,825
Workers' compensation reserve	3,872	3,670
Group health insurance	2,400	2,200
Other	3,700	4,024
Total accounts payable and accrued liabilities	$ 29,527	$ 26,421

Other Income (Details)

Other Income (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
MSHA reimbursement	$ 150	$ 503
Gain on sale of royalty interests in oil properties	2,500
Miscellaneous	1,462	195
Total Other Income	4,078	77
Savoy [Member]
Loss on disposal of equity method investment		(538)	$ (538)
Sunrise Energy [Member]
Equity income (loss)	$ (34)	$ (83)

Self Insurance (Details)

Self Insurance (Details) $ in Thousands	Mar. 31, 2019USD ($)misite	Dec. 31, 2018USD ($)	Mar. 31, 2018USD ($)
Self Insurance [Abstract]
Number of mining units with self-insured equipment | site	10
Area of self-insured mining units | mi	22
Mining equipment at historical cost	$ 260,000	$ 255,000
Restricted cash	$ 4,657	$ 4,592	$ 4,115

Net Income per Share (Details)

Net Income per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net income	$ 7,000	$ 2,132
Net income (loss) available to common shareholders	$ 6,820	$ 2,082
Weighted average number of common shares outstanding	30,245	29,955
Basic and diluted	$ 0.23	$ 0.07
Restricted Stock Units (RSUs) [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Less: earnings allocated to RSUs	$ (180)	$ (50)

Income Taxes (Expected Income T

Income Taxes (Expected Income Tax) (Details)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Taxes [Abstract]
Effective tax rate	0.00%	7.00%

Restricted Stock Units (RSUs)_2

Restricted Stock Units (RSUs) (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	Mar. 07, 2018	Mar. 31, 2019	Mar. 31, 2018	May 03, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share price (in dollars per share)				$ 5.07
Restricted Stock or Unit Expense (in Dollars)		$ 0.5	$ 2
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units outstanding value				$ 4
Shares available in stock bonus plan		1,250,466
Accelerated shares	220,000
Accelerated shares expense	$ 1.5

Restricted Stock Units (RSUs)_3

Restricted Stock Units (RSUs) (Schedule of Restricted Stock Units) (Details) - Restricted Stock Units (RSUs) [Member]	3 Months Ended
	Mar. 31, 2019$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-vested grants, beginning balance	789,250
Granted	8,000
Non-vested grants, ending balance	797,250
Weighted average share price, vested | $ / shares	$ 5.27

Restricted Stock Units (RSUs)_4

Restricted Stock Units (RSUs) (Restricted Stock Unit Vesting) (Details) - Restricted Stock Units (RSUs) [Member]	Mar. 31, 2019shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting in future period	797,250
2019 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting in future period	304,750
2020 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting in future period	176,250
2021 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting in future period	316,250

Revenue (Narrative) (Details)

Revenue (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Sep. 30, 2018
Sales Revenue, Net [Member] | Indiana [Member]
Percentage of revenue	72.00%	74.00%
Fixed-price Contract [Member]
Performance obligation	$ 756
Percentage of revenue expected to be recognized by set date	65.00%
Revenue, remaining performance obligation, expected timing of satisfaction, year	2020
Revenue, remaining performance obligation, expected timing of satisfaction, explanation	We expect to recognize approximately 65% of this revenue through 2020, with the remainder recognized thereafter.
Index Priced Contracts [Member]
Performance obligation	$ 330
Revenue, remaining performance obligation, expected timing of satisfaction, year			2020
Revenue, remaining performance obligation, expected timing of satisfaction, explanation	We expect to recognize all of this income beginning in 2020.

Leaes (Narrative) (Details)

Leaes (Narrative) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019USD ($)
Operating Lease, Right-of-Use Asset	$ 426
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:PropertyPlantAndEquipmentGross
Minimum [Member]
Contract term, operating lessee	1 year
Maximum [Member]
Contract term, operating lessee	4 years

Leaes (Schedule of information

Leaes (Schedule of information related to leases) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019USD ($)
Leases [Abstract]
Operating cash flows from operating leases	$ 79
Weighted average remaining lease term in years	4 years 3 months 4 days
Weighted average discount rate	6.00%

Leaes (Schedule of future minim

Leaes (Schedule of future minimum lease payments and balance sheet locations) (Details) $ in Thousands	Mar. 31, 2019USD ($)
Leases [Abstract]
2019	$ 89
2020	99
2021	103
2022	106
2023	72
Total minimum lease payments	469
Less imputed interest	(43)
Total operating lease liability	426
Operating Lease, Liability, Noncurrent	$ 426
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesNoncurrent

Hourglass Sands (Narrative) (De

Hourglass Sands (Narrative) (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Feb. 28, 2018	Mar. 31, 2019	Mar. 31, 2018	Sep. 30, 2018	Dec. 31, 2018
Business Acquisition [Line Items]
Operating costs and expenses		$ 62,419	$ 46,640
Cash and cash equivalents		8,690	$ 14,449		$ 15,502
Hourglass [Member]
Business Acquisition [Line Items]
Percentage of profit after capital investment and interest is returned				90.00%
Capitalization				$ 8,000
Cash and cash equivalents		2,300			2,900
Sand inventory		$ 1,600			$ 1,300
Hourglass [Member] | Director [Member]
Business Acquisition [Line Items]
Business acquisition purchase price	$ 4,000
Capital Unit, Class A [Member] | Hourglass [Member]
Business Acquisition [Line Items]
Percentage of profit until capital investment and interest is returned				100.00%
Hourglass Sands LLC [Member]
Business Acquisition [Line Items]
Date of acquisition agreement				Feb. 1, 2018
Business acquisition purchase price	$ 4,000
Hourglass Sands LLC [Member] | Hourglass [Member] | Director [Member]
Business Acquisition [Line Items]
Date of acquisition agreement				Feb. 1, 2018
Hourglass Sands LLC [Member] | Capital Unit, Class A [Member] | Hourglass [Member]
Business Acquisition [Line Items]
Equity method investment ownership percentage				100.00%

Hourglass Sands (Condensed Bala

Hourglass Sands (Condensed Balance Sheet) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Current assets	$ 76,227	$ 84,978
Total assets	507,169	515,499
Total liabilities	242,042	256,625
Total liabilities , redeemable noncontrolling interests, and stockholders' equity	507,169	515,499
Hourglass Sands LLC [Member]
Business Acquisition [Line Items]
Current assets	3,889	4,241
Property and equipment	3,086	3,092
Total assets	6,975	7,333
Total liabilities	395	502
Redeemable noncontrolling interests	4,000	4,000
Members' equity	2,580	2,831
Total liabilities , redeemable noncontrolling interests, and stockholders' equity	$ 6,975	$ 7,333

Hourglass Sands (Condensed Stat

Hourglass Sands (Condensed Statement of Operations) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Business Acquisition [Line Items]
Expenses	$ 82,349	$ 64,566
Net income	7,000	2,132
Hourglass Sands LLC [Member]
Business Acquisition [Line Items]
Revenue	63
Expenses	314	136
Net income	$ (251)	$ (136)

Subsequent Events (Narrative) (

Subsequent Events (Narrative) (Details)	Apr. 15, 2019	Mar. 31, 2019
Subsequent Event [Line Items]
Dividends Payable, Date Declared		Apr. 15, 2019
Subsequent Event [Member]
Subsequent Event [Line Items]
Dividends Payable, Date of Record	Apr. 30, 2019
Dividends Payable, Date to be Paid	May 17, 2019