Significant Accounting Policies (Policies)	12 Months Ended
Dec. 31, 2018
Accounting Policies [Abstract]
Use of Estimates, Policy [Policy Text Block]	Use of estimates —The preparation of these financial statements in conformity with U.S GAAP requires management to make estimates and assumptions that affect certain reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates. The most significant estimates are related to the quantity and value of coal inventories, equity-based compensation, asset retirement obligations, contingencies and the quantities and values of coal reserves.
Revenue Recognition, Policy [Policy Text Block]	Revenue Recognition — Our primary source of revenue is from the sale of coal through contracts with steel producers usually having durations of less than one year. We adopted Accounting Standards Update (“ASU”) 2014 - 09, Revenue from Contracts with Customers, on January 1, 2018 using the modified retrospective method. The core principle of ASU 2014 - 09 is to recognize revenues in a way that depicts the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled to in exchange for those goods or services. Before adoption of the new standard, revenue was recognized when risk of loss passed to our customer. The timing of revenue recognition for our coal sales remained consistent between the new and previous standards. There was no material impact on our consolidated financial statements from adopting the new standard but we have expanded disclosure about our revenues. For periods subsequent to January 1, 2018, revenue is recognized when performance obligations under the terms of a contract with our customers are satisfied. This occurs when control of the coal is transferred to our customers. For coal shipments to domestic customers via rail, control is generally transferred when the railcar is loaded. Control is transferred for export coal shipments to customers via ocean vessel when the vessel is loaded at the port. Our coal sales generally include up to 90 -day payment terms following the transfer of control of the goods to our customer. In the case of some of our foreign customers, our contracts also require that letters of credit are posted to secure payment of any outstanding receivable to the Company. We do not include extended payment terms in our contracts. Our contracts with customers typically provide for minimum specifications or qualities of the coal we deliver. Variances from these specifications or qualities are settled by means of price adjustments. Generally, these price adjustments are settled within 30 days of delivery and are small. Freight Revenue and Expense —Costs incurred to transport coal to the point of sale at the port facility are included in cost of sales and the gross amounts billed to customers to cover shipping to and handling of the coal at the port are included in sales.
Cash and Cash Equivalents, Policy [Policy Text Block]	Cash and Cash Equivalents —We classify all highly-liquid instruments with an original maturity of three months or less to be cash equivalents.
Marketable Securities, Policy [Policy Text Block]	Investment Securities — We generally invest our excess cash in certificates of deposit issued by federally insured financial institutions and short-term debt securities of U.S. Government agencies. Such investments are included in “cash and cash equivalents” or “short-term investments” on the accompanying consolidated balance sheets and are classified as held-to-maturity after consideration of our financial position, liquidity, and future plans. Investment securities are reported at cost, adjusted for premiums and discounts that are recognized in interest income using the interest method over the period to maturity.
Inventory, Policy [Policy Text Block]	Inventories — Coal is reported as inventory at the point in time it is extracted from the mine. Coal inventories are valued at the lower of average cost or net realizable value on a first -in, first -out inventory valuation method. Coal inventory costs include labor, supplies, equipment costs, freight and operating overhead. Coal inventory quantities are adjusted periodically based on aerial surveys of coal stockpiles.
Property, Plant and Equipment, Policy [Policy Text Block]	Property, Plant and Equipment —Property, plant and equipment is recorded at cost. Expenditures which extend the useful lives of existing plant and equipment are capitalized. Planned major maintenance costs which do not extend the useful lives of existing plant and equipment are expensed as incurred. When properties are retired or otherwise disposed, the related cost and accumulated depreciation are removed from the respective accounts and any profit or loss on disposition is recognized in the consolidated statements of operations. Coal exploration costs are expensed as incurred. Coal exploration costs include those incurred to ascertain existence, location, extent or quality of ore or minerals before beginning the development stage of the mine. Capitalized mine development costs represent the costs incurred to prepare mine sites for future mining. These costs include costs of acquiring, permitting, planning, research, and establishing access to identified mineral reserves and other preparations for commercial production as necessary to develop and permit the properties for mining activities. Operating expenditures including certain professional fees and overhead costs are not capitalized but are expensed as incurred. The capitalized mine development costs attributable to a mine are amortized on a units-of-production basis as mining of that mine’s assigned reserves takes place. Depreciation of plant and equipment is calculated on the straight-line method over their estimated useful lives ranging from three to thirty years.
Royalty Trust Distributable Income, Policy [Policy Text Block]	Advanced Coal Royalties —In most cases, we acquire the right to mine coal reserves under leases which call for the payment of royalties on coal as it is mined and sold. In many cases, these mineral leases require the payment of advance or minimum coal royalties to lessors that are recoupable against future production royalties. These advance payments are deferred and charged to operations as the coal reserves are mined.
Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]	Impairment of Long-lived Assets —We review and evaluate long-lived assets, including property, plant and equipment and mine development costs, for impairment when events or changes in circumstances indicate that the asset’s carrying value may not be recoverable. Recoverability is measured by comparing the net book value to the fair value. When the net book value exceeds the fair value, an impairment loss is measured and recorded. If it is determined that an undeveloped mineral interest cannot be economically converted to proven and probable reserves, or that the recoverability of capitalized mine development costs is uncertain, such capitalized costs are reduced to their net realizable value and an impairment loss is recorded to expense and future development costs are expensed as incurred.
Deferred Charges, Policy [Policy Text Block]	Deferred Offering Costs —Incremental costs directly attributable to a proposed or actual offering of securities may be deferred and charged against the gross proceeds of the offering. In March 2016, we expensed $3.1 million of previously deferred offering costs because the relevant period under applicable accounting guidance for the planned private offering of its equity securities expired. Costs incurred beginning in the third quarter of 2016 with the commencement of our IPO were deferred at December 31, 2016 and subsequently charged against the gross proceeds of our IPO.
Asset Retirement Obligation [Policy Text Block]	Asset Retirement Obligations —Legal obligations associated with the retirement of long-lived assets are reflected at their estimated fair value, with a corresponding charge to development costs, at the time they are incurred. Our asset retirement obligations primarily consist of spending estimates related to reclaiming metallurgical coal land and support facilities in accordance with federal and state reclamation laws as defined by each mining permit. The Company estimates and records the fair value of a liability for an asset retirement obligation in the period in which it is incurred and a corresponding increase in the carrying amount of the related long-lived asset. The liability is accreted to its present value each period and the capitalized cost is amortized using the units-of-production method over estimated recoverable reserves upon commencement of mining.
Fair Value Measurement, Policy [Policy Text Block]	Fair Value Measurements — For assets and liabilities that are recognized or disclosed at fair value in the consolidated financial statements, the Company defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. We use a three -level fair value hierarchy that categorizes assets and liabilities measured at fair value based on the observability of the inputs utilized in the valuation. These levels include: Level 1 - inputs are quoted prices in active markets for the identical assets or liabilities; Level 2 - inputs are other than quoted prices included in Level 1 that are directly or indirectly observable through market-corroborated inputs; and Level 3 - inputs are unobservable, or observable but cannot be market-corroborated, requiring us to make assumptions about pricing by market participants.
Income Tax, Policy [Policy Text Block]	Income Taxes —Prior to the Reorganization discussed in Note 1, we were a limited liability company taxed as a partnership. Accordingly, no provision for federal or state income taxes has been recognized in these financial statements for periods before the Reorganization on February 8, 2017. Income taxes are accounted for using a balance sheet approach. The Company accounts for deferred income taxes by applying statutory tax rates in effect at the reporting date of the balance sheet to differences between the book and tax basis of assets and liabilities. A valuation allowance is established if it is more likely than not that the related tax benefits will not be realized. In determining the appropriate valuation allowance, we consider the projected realization of tax benefits based on expected levels of future taxable income, available tax planning strategies and reversals of existing taxable temporary differences. Tax benefits from uncertain tax positions are recognized only if it is more likely than not that the tax position will be sustained on examination by the taxing authorities, based on the technical merits of the position. The Company had no unrecognized tax positions at December 31, 2018 or 2017. We file income tax returns in the U.S. and in various state and local jurisdictions which may be routinely examined by tax authorities. The statute of limitations is currently open for all tax returns filed.
Segment Reporting, Policy [Policy Text Block]	Segment Reporting —Our properties located in West Virginia, Virginia and Pennsylvania each consist of mineral reserves for production of metallurgical coal from both underground and surface mines. These operations are within the Appalachia basin. Geology, coal transportation routes to customers, regulatory environments and coal quality or type are characteristic to a basin. For financial reporting purposes, these operations represent a single segment because each possesses similar production methods, distribution methods, and economic characteristics, resulting in similar long-term expected financial performance.
Compensation Related Costs, Policy [Policy Text Block]	Equity-Based Compensation —We account for employee equity-based compensation using the fair value method. Compensation cost for equity incentive awards is based on the fair value of the equity instrument generally on the date of grant and is recognized over the requisite service period. The fair value of restricted stock awards is determined using the publicly-traded price of our common stock on the grant date. The fair value of option awards is calculated using the Black-Scholes option-pricing model. The Black-Scholes model requires us to make assumptions and judgments about the variables used in the calculation, including the expected term, expected volatility, risk-free interest rate, dividend rate and service period.
Concentration Risk, Credit Risk, Policy [Policy Text Block]	Concentrations —Our operations are all related to metallurgical coal within the mining industry. A reduction in metallurgical coal prices or other disturbances in the metallurgical coal markets could have an adverse effect on our operations. Financial instruments that potentially subject the Company to a significant concentration of credit risk consist primarily of cash and cash equivalents, investment securities and accounts receivable. We maintain deposits in federally insured financial institutions in excess of federally insured limits. The Company monitors the credit ratings and concentration of risk with these financial institutions on a continuing basis to safeguard cash deposits. We have a limited number of customers. Contracts with these customers provide for billings principally upon shipment and compliance with payment terms is monitored on an ongoing basis. Outstanding receivables beyond payment terms are promptly investigated and discussed with the specific customer. We estimate an allowance for doubtful accounts based on an analysis of specific customers, taking into consideration the age of past due accounts and an assessment of the customer’s ability to pay. The Company determined that an allowance for doubtful accounts was not needed as of December 31, 2018 and 2017. During 2018, sales to five customers accounted for approximately 63% of total revenue. The total balance due from these customers at December 31, 2018 was approximately 72% of total accounts receivable. During 2017, sales to four customers accounted for approximately 77% of total revenue. The total balance due from these customers at December 31, 2017 was approximately 71% of total accounts receivable.
Reclassification, Policy [Policy Text Block]	Reclassifications —Financial statements presented for prior periods include reclassifications that were made to conform to the current-year presentation.
New Accounting Pronouncements, Policy [Policy Text Block]	Recent Accounting Pronouncements —In May 2014, the FASB issued Accounting Standards Update (“ASU”) 2014 - 09, Revenue from Contracts with Customers . The new standard supersedes nearly all existing revenue recognition guidance under U.S. GAAP. The core principle of ASU 2014 - 09 is to recognize revenues in a way that depicts the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled to in exchange for those goods or services. ASU 2014 - 09 defines a five -step process to achieve this core principle and, in doing so, it is possible that more judgment and estimates may be required within the revenue recognition process than is required under present U.S. GAAP. These may include identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price, and allocating the transaction price to each separate performance obligation. The new standard also requires additional disclosure about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and changes in judgments. We adopted this new standard on January 1, 2018 using the modified retrospective method of adoption. The adoption of this standard did not have a material effect on our financial position, results of operations or cash flows, but resulted in increased disclosures related to revenue recognition policies and disaggregation of revenues. In February 2016, the FASB issued ASU 2016 - 02, Leases , which aims to make leasing activities more transparent and comparable and requires substantially all leases be recognized by lessees on their balance sheet as a right-of-use asset and corresponding lease liability, including leases currently accounted for as operating leases. Leases of mineral reserves and related land leases have been exempted from the standard. The Company will elect the “package of practical expedients” within the standard which permits the Company not to reassess its prior conclusions about lease identification, lease classification and initial direct costs. The Company will make an accounting policy election to not separate lease and non-lease components for all leases. This ASU is effective for public companies for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years with early adoption permitted. The Company expects the adoption of this standard to result in the recognition of right-of-use assets and lease liabilities ranging between $0.2 million and $0.4 million not currently recorded on the Company’s balance sheet.

Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2018

Use of Estimates, Policy [Policy Text Block]

Use of estimates

—The preparation of these financial statements in conformity with U.S GAAP requires management to make estimates and assumptions that affect certain reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates. The most significant estimates are related to the quantity and value of coal inventories, equity-based compensation, asset retirement obligations, contingencies and the quantities and values of coal reserves.

Revenue Recognition, Policy [Policy Text Block]

Revenue Recognition

— Our primary source of revenue is from the sale of coal through contracts with steel producers usually having durations of less than

one

year. We adopted Accounting Standards Update (“ASU”)

2014

09,

Revenue from Contracts with Customers, on

January 1, 2018

using the modified retrospective method. The core principle of ASU

2014

is to recognize revenues in a way that depicts the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled to in exchange for those goods or services. Before adoption of the new standard, revenue was recognized when risk of loss passed to our customer. The timing of revenue recognition for our coal sales remained consistent between the new and previous standards. There was

material impact on our consolidated financial statements from adopting the new standard but we have expanded disclosure about our revenues.

For periods subsequent to

January 1, 2018,

revenue is recognized when performance obligations under the terms of a contract with our customers are satisfied. This occurs when control of the coal is transferred to our customers. For coal shipments to domestic customers via rail, control is generally transferred when the railcar is loaded. Control is transferred for export coal shipments to customers via ocean vessel when the vessel is loaded at the port.

Our coal sales generally include up to

-day payment terms following the transfer of control of the goods to our customer. In the case of some of our foreign customers, our contracts also require that letters of credit are posted to secure payment of any outstanding receivable to the Company. We do

not

include extended payment terms in our contracts. Our contracts with customers typically provide for minimum specifications or qualities of the coal we deliver. Variances from these specifications or qualities are settled by means of price adjustments. Generally, these price adjustments are settled within

days of delivery and are small.

Freight Revenue and Expense

—Costs incurred to transport coal to the point of sale at the port facility are included in cost of sales and the gross amounts billed to customers to cover shipping to and handling of the coal at the port are included in sales.

Cash and Cash Equivalents, Policy [Policy Text Block]

Cash and Cash Equivalents

—We classify all highly-liquid instruments with an original maturity of

three

months or less to be cash equivalents.

Marketable Securities, Policy [Policy Text Block]

Investment Securities

— We generally invest our excess cash in certificates of deposit issued by federally insured financial institutions and short-term debt securities of U.S. Government agencies. Such investments are included in “cash and cash equivalents” or “short-term investments” on the accompanying consolidated balance sheets and are classified as held-to-maturity after consideration of our financial position, liquidity, and future plans. Investment securities are reported at cost, adjusted for premiums and discounts that are recognized in interest income using the interest method over the period to maturity.

Inventory, Policy [Policy Text Block]

Inventories

— Coal is reported as inventory at the point in time it is extracted from the mine. Coal inventories are valued at the lower of average cost or net realizable value on a

first

-in,

first

-out inventory valuation method. Coal inventory costs include labor, supplies, equipment costs, freight and operating overhead. Coal inventory quantities are adjusted periodically based on aerial surveys of coal stockpiles.

Property, Plant and Equipment, Policy [Policy Text Block]

Property, Plant and Equipment

—Property, plant and equipment is recorded at cost. Expenditures which extend the useful lives of existing plant and equipment are capitalized. Planned major maintenance costs which do

not

extend the useful lives of existing plant and equipment are expensed as incurred. When properties are retired or otherwise disposed, the related cost and accumulated depreciation are removed from the respective accounts and any profit or loss on disposition is recognized in the consolidated statements of operations.

Coal exploration costs are expensed as incurred. Coal exploration costs include those incurred to ascertain existence, location, extent or quality of ore or minerals before beginning the development stage of the mine.

Capitalized mine development costs represent the costs incurred to prepare mine sites for future mining. These costs include costs of acquiring, permitting, planning, research, and establishing access to identified mineral reserves and other preparations for commercial production as necessary to develop and permit the properties for mining activities. Operating expenditures including certain professional fees and overhead costs are

not

capitalized but are expensed as incurred.

The capitalized mine development costs attributable to a mine are amortized on a units-of-production basis as mining of that mine’s assigned reserves takes place. Depreciation of plant and equipment is calculated on the straight-line method over their estimated useful lives ranging from

three

thirty

years.

Royalty Trust Distributable Income, Policy [Policy Text Block]

Advanced Coal Royalties

—In most cases, we acquire the right to mine coal reserves under leases which call for the payment of royalties on coal as it is mined and sold. In many cases, these mineral leases require the payment of advance or minimum coal royalties to lessors that are recoupable against future production royalties. These advance payments are deferred and charged to operations as the coal reserves are mined.

Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]

Impairment of Long-lived Assets

—We review and evaluate long-lived assets, including property, plant and equipment and mine development costs, for impairment when events or changes in circumstances indicate that the asset’s carrying value

may

not

be recoverable. Recoverability is measured by comparing the net book value to the fair value. When the net book value exceeds the fair value, an impairment loss is measured and recorded.

If it is determined that an undeveloped mineral interest cannot be economically converted to proven and probable reserves, or that the recoverability of capitalized mine development costs is uncertain, such capitalized costs are reduced to their net realizable value and an impairment loss is recorded to expense and future development costs are expensed as incurred.

Deferred Charges, Policy [Policy Text Block]

Deferred Offering Costs

—Incremental costs directly attributable to a proposed or actual offering of securities

may

be deferred and charged against the gross proceeds of the offering. In

March 2016,

we expensed

$3.1

million of previously deferred offering costs because the relevant period under applicable accounting guidance for the planned private offering of its equity securities expired. Costs incurred beginning in the

third

quarter of

2016

with the commencement of our IPO were deferred at

December 31, 2016

and subsequently charged against the gross proceeds of our IPO.

Asset Retirement Obligation [Policy Text Block]

Asset Retirement Obligations

—Legal obligations associated with the retirement of long-lived assets are reflected at their estimated fair value, with a corresponding charge to development costs, at the time they are incurred. Our asset retirement obligations primarily consist of spending estimates related to reclaiming metallurgical coal land and support facilities in accordance with federal and state reclamation laws as defined by each mining permit. The Company estimates and records the fair value of a liability for an asset retirement obligation in the period in which it is incurred and a corresponding increase in the carrying amount of the related long-lived asset. The liability is accreted to its present value each period and the capitalized cost is amortized using the units-of-production method over estimated recoverable reserves upon commencement of mining.

Fair Value Measurement, Policy [Policy Text Block]

Fair Value Measurements

— For assets and liabilities that are recognized or disclosed at fair value in the consolidated financial statements, the Company defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. We use a

three

-level fair value hierarchy that categorizes assets and liabilities measured at fair value based on the observability of the inputs utilized in the valuation. These levels include: Level

- inputs are quoted prices in active markets for the identical assets or liabilities; Level

- inputs are other than quoted prices included in Level

that are directly or indirectly observable through market-corroborated inputs; and Level

- inputs are unobservable, or observable but cannot be market-corroborated, requiring us to make assumptions about pricing by market participants.

Income Tax, Policy [Policy Text Block]

Income Taxes

—Prior to the Reorganization discussed in Note

we were a limited liability company taxed as a partnership. Accordingly,

provision for federal or state income taxes has been recognized in these financial statements for periods before the Reorganization on

February 8, 2017.

Income taxes are accounted for using a balance sheet approach. The Company accounts for deferred income taxes by applying statutory tax rates in effect at the reporting date of the balance sheet to differences between the book and tax basis of assets and liabilities. A valuation allowance is established if it is more likely than

not

that the related tax benefits will

not

be realized. In determining the appropriate valuation allowance, we consider the projected realization of tax benefits based on expected levels of future taxable income, available tax planning strategies and reversals of existing taxable temporary differences.

Tax benefits from uncertain tax positions are recognized only if it is more likely than

not

that the tax position will be sustained on examination by the taxing authorities, based on the technical merits of the position. The Company had

unrecognized tax positions at

December 31, 2018

2017.

We file income tax returns in the U.S. and in various state and local jurisdictions which

may

be routinely examined by tax authorities. The statute of limitations is currently open for all tax returns filed.

Segment Reporting, Policy [Policy Text Block]

Segment Reporting

—Our properties located in West Virginia, Virginia and Pennsylvania each consist of mineral reserves for production of metallurgical coal from both underground and surface mines. These operations are within the Appalachia basin. Geology, coal transportation routes to customers, regulatory environments and coal quality or type are characteristic to a basin. For financial reporting purposes, these operations represent a single segment because each possesses similar production methods, distribution methods, and economic characteristics, resulting in similar long-term expected financial performance.

Equity-Based Compensation

—We account for employee equity-based compensation using the fair value method. Compensation cost for equity incentive awards is based on the fair value of the equity instrument generally on the date of grant and is recognized over the requisite service period.

The fair value of restricted stock awards is determined using the publicly-traded price of our common stock on the grant date. The fair value of option awards is calculated using the Black-Scholes option-pricing model. The Black-Scholes model requires us to make assumptions and judgments about the variables used in the calculation, including the expected term, expected volatility, risk-free interest rate, dividend rate and service period.

Concentration Risk, Credit Risk, Policy [Policy Text Block]

Concentrations

—Our operations are all related to metallurgical coal within the mining industry. A reduction in metallurgical coal prices or other disturbances in the metallurgical coal markets could have an adverse effect on our operations.

Financial instruments that potentially subject the Company to a significant concentration of credit risk consist primarily of cash and cash equivalents, investment securities and accounts receivable. We maintain deposits in federally insured financial institutions in excess of federally insured limits. The Company monitors the credit ratings and concentration of risk with these financial institutions on a continuing basis to safeguard cash deposits.

We have a limited number of customers. Contracts with these customers provide for billings principally upon shipment and compliance with payment terms is monitored on an ongoing basis. Outstanding receivables beyond payment terms are promptly investigated and discussed with the specific customer. We estimate an allowance for doubtful accounts based on an analysis of specific customers, taking into consideration the age of past due accounts and an assessment of the customer’s ability to pay. The Company determined that an allowance for doubtful accounts was

not

needed as of

December 31, 2018

and

2017.

During

2018,

sales to

five

customers accounted for approximately

63%

of total revenue. The total balance due from these customers at

December 31, 2018

was approximately

72%

of total accounts receivable. During

2017,

sales to

four

customers accounted for approximately

77%

of total revenue. The total balance due from these customers at

December 31, 2017

was approximately

71%

of total accounts receivable.

Reclassification, Policy [Policy Text Block]

Reclassifications

—Financial statements presented for prior periods include reclassifications that were made to conform to the current-year presentation.

New Accounting Pronouncements, Policy [Policy Text Block]

Recent Accounting Pronouncements

—In

May 2014,

the FASB issued Accounting Standards Update (“ASU”)

2014

09,

Revenue from

Contracts with Customers

. The new standard supersedes nearly all existing revenue recognition guidance under U.S. GAAP. The core principle of ASU

2014

defines a

five

-step process to achieve this core principle and, in doing so, it is possible that more judgment and estimates

may

be required within the revenue recognition process than is required under present U.S. GAAP. These

may

include identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price, and allocating the transaction price to each separate performance obligation. The new standard also requires additional disclosure about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and changes in judgments. We adopted this new standard on

January 1, 2018

using the modified retrospective method of adoption. The adoption of this standard did

not

have a material effect on our financial position, results of operations or cash flows, but resulted in increased disclosures related to revenue recognition policies and disaggregation of revenues.

February 2016,

the FASB issued ASU

2016

02,

Leases

, which aims to make leasing activities more transparent and comparable and requires substantially all leases be recognized by lessees on their balance sheet as a right-of-use asset and corresponding lease liability, including leases currently accounted for as operating leases. Leases of mineral reserves and related land leases have been exempted from the standard. The Company will elect the “package of practical expedients” within the standard which permits the Company

not

to reassess its prior conclusions about lease identification, lease classification and initial direct costs. The Company will make an accounting policy election to

not

separate lease and non-lease components for all leases. This ASU is effective for public companies for fiscal years beginning after

December 15, 2018,

including interim periods within those fiscal years with early adoption permitted. The Company expects the adoption of this standard to result in the recognition of right-of-use assets and lease liabilities ranging between

$0.2

million and

$0.4

million

not

currently recorded on the Company’s balance sheet.