Summary of Components of Accounts Receivable (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Receivables Net Current [Abstract]
Product sales receivable, net of discounts and allowances	$ 117,733	$ 100,870
Government contract receivables	470	470
Total accounts receivable, net	$ 118,203	$ 101,340

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

Amounts due for billed services rendered or to be rendered, actions taken or to be taken, or a promise to refrain from taking certain actions in accordance with the terms of a legally binding agreement between the Company and, at a minimum, one other party. An example would be amounts billed to customers under contracts or programs but not paid as of the balance sheet date.

+ References

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-Publisher FASB
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- Definition

The amount of receivables that are derived from government contracts.

+ References

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- References

No definition available.

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