Investments in Non-Marketable Securities - Narrative (Details) - USD ($)	1 Months Ended	3 Months Ended		9 Months Ended
	Jul. 31, 2021	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020	Nov. 30, 2020
Marketable Securities [Line Items]
Investment in non-marketable debt security		$ 0		$ 0		$ 1,000,000
Conversion, debt to equity	$ 1,300,000
Interest income from amortization of discount		0	$ 0	300,000	$ 0
Change in fair value of embedded bifurcated derivative recognized in other income		0
Change in fair value of embedded bifurcated derivative recognized in other expense				10,500
Debt securities, unrealized or realized gains or losses		0	0	0	0
Other expenses			0		0
Upward price adjustment, annual amount			0	700,000	0
Downward price adjustment, annual amount			$ 0		$ 0
Investment in non-marketable equity securities		12,763,000		12,763,000		1,450,000
Molecular Assemblies, Inc.
Marketable Securities [Line Items]
Investment in non-marketable equity securities		11,500,000		11,500,000		1,500,000
Arzeda Corp.
Marketable Securities [Line Items]
Investment in non-marketable equity securities		$ 1,300,000		$ 1,300,000
Series B-2 Preferred Stock
Marketable Securities [Line Items]
Debt conversion, shares issued (in shares)	207,070
Level 3
Marketable Securities [Line Items]
Investment in non-marketable debt security						$ 1,000,000	$ 1,000,000