Summary of Business and Significant Accounting Policies - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended	3 Months Ended		12 Months Ended
	Aug. 31, 2021	Jul. 31, 2021	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021		Sep. 30, 2021	Aug. 03, 2021	Jul. 15, 2021
Summary Of Significant Accounting Policies [Line Items]
Net loss			$ (1,999)	$ (2,212)	$ 12,944
Accumulated deficit			(306,106)		(304,107)	[1]
Cash, cash equivalents and restricted cash			41,756
Aggregate gross sales price	$ 22,800							$ 22,800	$ 40,000
Issuance of common stock through equity distribution agreement, net of offering costs				3,025
Allowance for doubtful accounts			770		786
Allowance for potential customer revenue credits			116		131
Impairment of long-lived assets held-for-use			0		$ 0
Offering costs				$ 157
Accounting Standards Update 2019-12 [Member]
Summary Of Significant Accounting Policies [Line Items]
Accounting standards update, adopted [true false]							true
Accounting standards update, immaterial effect [true false]							true
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Aggregate gross sales price			$ 50,000					100,000
Offering costs	100,000
At-the-market Offering [Member]
Summary Of Significant Accounting Policies [Line Items]
Aggregate gross sales price	$ 50,000							50,000
2021 Equity Distribution Agreement [Member]
Summary Of Significant Accounting Policies [Line Items]
Issuance of common stock through equity distribution agreement, net of offering costs (in shares)		4,316,000
Issuance of common stock through equity distribution agreement, net of offering costs		$ 38,800
Weighted average sales price (in dollars per share)		$ 9.27
2021 Equity Distribution Agreement [Member] | JMP Securities [Member]
Summary Of Significant Accounting Policies [Line Items]
Aggregate gross sales price								$ 50,000
2021 Equity Distribution Agreement [Member] | At-the-market Offering [Member] | JMP Securities [Member]
Summary Of Significant Accounting Policies [Line Items]
Issuance of common stock through equity distribution agreement, net of offering costs (in shares)		4,316,000
Issuance of common stock through equity distribution agreement, net of offering costs		$ 38,800
Offering costs		$ 1,200
2021 Equity Distribution Agreement [Member] | At-the-market Offering [Member] | JMP Securities [Member] | Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Aggregate gross sales price									$ 40,000

[1] Derived from the Company’s audited consolidated financial statements as of December 31, 2021.