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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The amount of excise and sales taxes included in sales and revenues, which are then deducted as a cost of sales. Includes excise taxes, which are applied to specific types of transactions or items (such as gasoline or alcohol); and sales, use and value added taxes, which are applied to a broad class of revenue-producing transactions involving a wide range of goods and services.

+ References

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Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

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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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Business Segment Information - Additional Information (Detail)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) Segment	Sep. 30, 2019 USD ($)	Dec. 31, 2019
Segment Reporting Information [Line Items]
Number of operating segment \| Segment			2
Revenue	$ 51,406,000	$ 51,101,000	$ 153,922,000	$ 120,043,000
Excise duties	$ 4,213,000	$ 2,931,000	$ 13,325,000	$ 8,707,000
Customer Concentration Risk [Member] \| Revenue [Member] \| Customer A [Member]
Segment Reporting Information [Line Items]
Concentration risk percentage	21.00%	20.00%	20.00%	12.00%
Customer Concentration Risk [Member] \| Revenue [Member] \| Customer B [Member]
Segment Reporting Information [Line Items]
Concentration risk percentage	19.00%	14.00%	18.00%	11.00%
Customer Concentration Risk [Member] \| Revenue [Member] \| Customer C [Member]
Segment Reporting Information [Line Items]
Concentration risk percentage		10.00%	11.00%
Customer Concentration Risk [Member] \| Accounts Receivable [Member] \| Customer A [Member]
Segment Reporting Information [Line Items]
Concentration risk percentage			20.00%		20.00%
Customer Concentration Risk [Member] \| Accounts Receivable [Member] \| Customer B [Member]
Segment Reporting Information [Line Items]
Concentration risk percentage			11.00%		10.00%
Intersegment Sales or Transfers [Member]
Segment Reporting Information [Line Items]
Revenue			$ 0