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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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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.

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Amount of fair value of reporting unit in excess of carrying amount.

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Percentage of fair value of reporting unit in excess of carrying amount.

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Goodwill - Additional Information (Detail) - USD ($)	3 Months Ended	9 Months Ended
Goodwill - Additional Information (Detail) - USD ($)	Mar. 31, 2020	Sep. 30, 2020	Dec. 31, 2019
Goodwill [Line Items]
Goodwill	$ 159,595,000	$ 159,595,000	$ 163,251,000
Goodwill, impaired, facts and circumstances leading to impairment		A relatively small change in the underlying assumptions, including a 1% change in the weighted average cost of capital, continued lack of clarity from the Food and Drug Administration regarding approval of CBD, or the financial performance of the reporting unit in future years, may cause a change in the results of the impairment assessment in future periods and, as such, could result in an impairment of goodwill.
Hemp Reporting Unit [Member]
Goodwill [Line Items]
Goodwill	$ 130,343,000
Reporting unit, percentage of fair value in excess of carrying amount	26.00%
Reporting unit, amount of fair value in excess of carrying amount	$ 76,998,000
Goodwill impairment loss	$ 0
Hemp Reporting Unit [Member] \| Minimum [Member]
Goodwill [Line Items]
Weighted average cost of capital discount rate	10.00%
Hemp Reporting Unit [Member] \| Minimum [Member] \| Revenue and Expense Growth Assumptions [Member]
Goodwill [Line Items]
Reporting unit, percentage of fair value in excess of carrying amount	9.00%
Hemp Reporting Unit [Member] \| Maximum [Member]
Goodwill [Line Items]
Weighted average cost of capital discount rate	12.00%
Hemp Reporting Unit [Member] \| Maximum [Member] \| Revenue and Expense Growth Assumptions [Member]
Goodwill [Line Items]
Reporting unit, percentage of fair value in excess of carrying amount	38.00%