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Contract With Customer, Customer Payment Terms

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Amount of allowance for credit loss on accounts receivable.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of direct write-downs of accounts receivable charged against the allowance.

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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For an unclassified balance sheet, amounts due from related parties including affiliates, employees, joint ventures, officers and stockholders, immediate families thereof, and pension funds.

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Amount of expense (reversal of expense) for expected credit loss on accounts receivable.

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Fair Value Measurements and Financial Instruments (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents measured at fair value	$ 41,200		$ 86,900
Cash balances on deposit with financial institutions	$ 56,531		112,690
Customer payment terms	45 days
Allowance for uncollectible accounts	$ 3,576		1,053
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for uncollectible accounts	3,576		1,053
Bad Debt Expense [Abstract]
Current period provision	2,523
Accounts Receivable, Allowance for Credit Loss, Writeoff	0
Liberty Resources LLC \| Hydraulic Fracturing Services \| Affiliated Entity
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Due from related parties	$ 0		$ 2,500
Customer Concentration Risk \| Largest Two Customers \| Accounts Receivable
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Concentration risk, percentage	11.00%
Customer Concentration Risk \| Largest Two Customers \| Total Revenue
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Concentration risk, percentage		22.00%
Customer Concentration Risk \| Largest Customer \| Accounts Receivable
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Concentration risk, percentage			12.00%
Customer Concentration Risk \| Largest Customer \| Total Revenue
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Concentration risk, percentage	15.00%