Percentage points added to the reference rate to compute the variable rate on the debt instrument.

No definition available.

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- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

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- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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- Definition

The average effective interest rate during the reporting period.

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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Amount of the required periodic payments including both interest and principal payments.

+ References

+ Details

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Period Type:	duration

- Definition

Amount of the required periodic payments applied to principal.

+ References

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- Definition

Weighted average interest rate of debt outstanding.

+ References

No definition available.

+ Details

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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Period Type:	instant

- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

+ Details

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- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

+ References

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- Definition

Date the credit facility first became available, in CCYY-MM-DD format.

+ References

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

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- Definition

Weighted average interest rate of long-term debt outstanding calculated at point in time.

+ References

No definition available.

+ Details

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- Definition

The cash inflow from bank borrowing during the year.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
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Long-Term Debt - Additional Information (Detail) - USD ($)				1 Months Ended			9 Months Ended
	Jan. 26, 2018	Jan. 12, 2018	Jun. 26, 2015	Feb. 15, 2017	Dec. 31, 2014	Aug. 31, 2014	Sep. 30, 2019	Jul. 17, 2019	Jun. 26, 2019	Jan. 08, 2019	Sep. 30, 2018	Dec. 22, 2017	Jul. 29, 2014
Credit Agreement [Member]
Debt Instrument [Line Items]
Credit facility borrowing base										$ 100,000,000
Outstanding borrowings under revolving credit facility							$ 61,500,000
Weighted-average interest rate of borrowings							5.15%
Credit facility remaining borrowing capacity							$ 28,500,000
Additional Equipment Loan [Member]
Debt Instrument [Line Items]
Credit facility remaining borrowing capacity						$ 1,200,000
Equipment Loan, face amount													$ 6,000,000
Percentage for base rate loans at the prime rate	3.50%					3.40%
Equipment Loan, monthly payment	$ 7,986					$ 87,800
Equipment Loan, maturity date	Jun. 26, 2020						Jul. 31, 2019
Additional equipment Loan, drawings					$ 500,000	$ 4,800,000
Equipment Loan, interest rate description							interim draws to finance the acquisition of any future field service equipment. In December 2014, the Company made an interim draw of an additional $0.5 million on this facility that is secured by recently purchased field service equipment. Interim draws on this facility carried a floating interest rate; payable monthly at the LIBO published rate plus 2.50% and on June 26, 2015 converted into a fixed term loan, with a rate of 3.50% and requiring monthly payments
Equipment Loan, principal payment amount		$ 20,858
Fixed Term Loan [Member] \| Additional Equipment Loan [Member]
Debt Instrument [Line Items]
Equipment Loan, monthly payment			$ 8,700
Equipment Loan, maturity date							Jun. 26, 2020
Equipment Loan, Interest rate on fixed loans							3.50%
2017 Credit Agreement [Member]
Debt Instrument [Line Items]
Credit facility borrowing capacity				$ 300,000,000
Credit agreement date				Feb. 15, 2017
Credit facility borrowing base									$ 90,000,000			$ 85,000,000
Line of Credit Facility, Expiration Date				Feb. 15, 2021
Credit Agreement [Member]
Debt Instrument [Line Items]
Credit facility borrowing base								$ 90,000,000
London Interbank Offered Rate (LIBOR) [Member] \| Additional Equipment Loan [Member]
Debt Instrument [Line Items]
LIBOR rate loans							2.50%
Base Rate And Libor [Member] \| Credit Agreement [Member]
Debt Instrument [Line Items]
Debt instrument basis weighted average interest rate spread on variable rate							5.44%				5.30%