Customer Concentrations - Additional Information (Detail) - Customer Concentration Risk [Member] - Customer |
3 Months Ended | 6 Months Ended | 12 Months Ended | ||
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Jun. 30, 2019 |
Jun. 30, 2018 |
Jun. 30, 2019 |
Jun. 30, 2018 |
Dec. 31, 2018 |
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Revenues [Member] | |||||
Concentration Risk [Line Items] | |||||
Number of customers | 2 | 1 | 3 | 1 | |
Concentration percentage | 95.00% | 97.00% | 75.00% | 97.00% | |
Accounts Receivable [Member] | |||||
Concentration Risk [Line Items] | |||||
Number of customers | 2 | 3 | |||
Concentration percentage | 95.00% | 86.00% |
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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. No definition available.
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- Definition 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. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Concentration risk, number of customers. No definition available.
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