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Stockholders' Equity (Narrative) (Details) $ / shares in Units, $ in Thousands				1 Months Ended	3 Months Ended
	Nov. 22, 2021 shares	Sep. 20, 2021 item shares	Apr. 18, 2021 shares	Feb. 28, 2022 shares	Mar. 31, 2022 USD ($) $ / shares shares	Mar. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2021 $ / shares shares	Dec. 02, 2020 shares	Aug. 04, 2020 shares
Stockholders' Equity [Line Items]
Common Stock Shares Issued					224,329,000		220,978,000
Proceeds From Issuance Of Common Stock | $					$ 5,592	$ 22,343
Common Stock Par Or Stated Value Per Share | $ / shares					$ 0.001		$ 0.001
Omniome Plan [Member]
Stockholders' Equity [Line Items]
Exchange ratio | item		0.259204639
Shares authorized		2,494,128
ESPP [Member]
Stockholders' Equity [Line Items]
Shares issued					1,316,923	983,180
Additional common stock reserved for issuance				4,000,000.0
Common stock remain available for issuance					10,493,750
Stock-based compensation expense | $					$ 3,300
2020 Equity Incentive Plan [Member]
Stockholders' Equity [Line Items]
Shares authorized									11,000,000
Common stock remain available for issuance					1,200,000
2020 Inducement Equity Incentive Plan [Member]
Stockholders' Equity [Line Items]
Shares authorized								2,500,000
Additional common stock reserved for issuance	360,000		750,000
Time-based and performance-based options [Member]
Stockholders' Equity [Line Items]
Stock-based compensation expense | $					$ 7,500
Options to purchase common stock [Member]
Stockholders' Equity [Line Items]
Weighted average grant date fair value per share | $ / shares					$ 6.66	$ 20.21
RSUs with performance-based vesting [Member]
Stockholders' Equity [Line Items]
Stock-based compensation expense | $					$ 11,900

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