Customer Concentration - Additional Information (Detail) - Customer Concentration Risk [Member] - Customer |
3 Months Ended | 12 Months Ended | |
---|---|---|---|
Mar. 31, 2019 |
Mar. 31, 2018 |
Dec. 31, 2018 |
|
Revenues [Member] | |||
Concentration Risk [Line Items] | |||
Number of customers | 4 | 1 | |
Concentration percentage | 98.00% | 100.00% | |
Accounts Receivable [Member] | |||
Concentration Risk [Line Items] | |||
Number of customers | 4 | 3 | |
Concentration percentage | 98.00% | 86.00% |
X | ||||||||||
- 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.
|
X | ||||||||||
- 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
|
X | ||||||||||
- Definition Concentration risk, number of customers. No definition available.
|
X | ||||||||||
- Details
|
X | ||||||||||
- Details
|
X | ||||||||||
- Details
|