Condensed Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Deficit
Balances at Dec. 31, 2020	$ 41,166	$ 27	$ 299,953	$ (258,814)
Common Stock Balance, Shares at Dec. 31, 2020		26,562,000
Exercise of stock options	475		475
Exercise of stock options, shares		223,000
Stock‑based compensation	1,752		1,752
Net loss	(6,961)			(6,961)
Balances at Mar. 31, 2021	36,432	$ 27	302,180	(265,775)
Common Stock Balance, Shares at Mar. 31, 2021		26,785,000
Balances at Dec. 31, 2020	41,166	$ 27	299,953	(258,814)
Common Stock Balance, Shares at Dec. 31, 2020		26,562,000
Stock‑based compensation	539
Net loss	(18,363)
Balances at Jun. 30, 2021	25,773	$ 27	302,923	(277,177)
Common Stock Balance, Shares at Jun. 30, 2021		26,949,000
Balances at Mar. 31, 2021	36,432	$ 27	302,180	(265,775)
Common Stock Balance, Shares at Mar. 31, 2021		26,785,000
Exercise of stock options	204		204
Exercise of stock options, shares		164,000
Stock‑based compensation			539
Net loss	(11,402)			(11,402)
Balances at Jun. 30, 2021	25,773	$ 27	302,923	(277,177)
Common Stock Balance, Shares at Jun. 30, 2021		26,949,000
Balances at Dec. 31, 2021	19,727	$ 31	321,669	(301,973)
Common Stock Balance, Shares at Dec. 31, 2021		30,790,000
Issuance of common stock under employee stock purchase plan	202		202
Issuance of common stock under employee stock purchase plan, Shares		99,000
Issuance of common stock for deferred offering costs	600		600
Issuance of common stock for deferred offering costs, Shares		184,000
Issuance of common stock, net	1,417	$ 1	1,416
Issuance of common stock, net, Shares		709,000
Exercise of stock options	75		75
Exercise of stock options, shares		107,000
Stock‑based compensation	1,346		1,346
Net loss	(15,586)			(15,586)
Balances at Mar. 31, 2022	7,781	$ 32	325,308	(317,559)
Common Stock Balance, Shares at Mar. 31, 2022		31,889,000
Balances at Dec. 31, 2021	$ 19,727	$ 31	321,669	(301,973)
Common Stock Balance, Shares at Dec. 31, 2021		30,790,000
Exercise of stock options, shares	130,000
Net loss	$ (31,410)
Balances at Jun. 30, 2022	7,671	$ 40	341,014	(333,383)
Common Stock Balance, Shares at Jun. 30, 2022		39,979,000
Balances at Mar. 31, 2022	7,781	$ 32	325,308	(317,559)
Common Stock Balance, Shares at Mar. 31, 2022		31,889,000
Issuance of common stock, net	14,329	$ 8	14,321
Issuance of common stock, net, Shares		7,928,000
Exercise of stock options	$ 17		17
Exercise of stock options, shares		24,000
Release of restricted stock units, shares	138,000
Stock‑based compensation	$ 1,368		1,368
Net loss	(15,824)			(15,824)
Balances at Jun. 30, 2022	$ 7,671	$ 40	$ 341,014	$ (333,383)
Common Stock Balance, Shares at Jun. 30, 2022		39,979,000