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Balance Sheet Details - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Debt securities, impairment losses	$ 0	$ 0
Debt securities, available-for-sale, unrealized gain (loss)	172,000	172,000	$ (77,000)
Debt securities, available-for-sale, realized gain (loss)	0	8,000	0
Inventory	41,905,000	24,968,000
Depreciation and amortization	2,847,000	2,044,000	$ 1,513,000
Construction in Progress, Gross	14,100,000	13,500,000
SUSTOL
Inventory	4,100,000	1,500,000
Cost of product sales, charges	100,000	3,300,000
CINVANTI
Inventory	$ 37,800,000	$ 23,500,000

X

- Definition

Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service.

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Amount of realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of unrealized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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- Definition

The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount of other-than-temporary impairment (OTTI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), recognized in earnings and other comprehensive loss (OCI).

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Nonrecurring impairment charges related to the write-off of production-related equipment and inventory. This tag is used when an Entity charges this cost to cost of goods sold.

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