Basis of Presentation and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2021

Accounting Policies [Abstract]

Schedule of reconciliation of the components of cash and restricted cash

	December 31,
(in thousands)	2021		2020
Cash	$	41,255	$	20,762
Restricted cash		125		2,211
Restricted cash, non-current		207		—
Total cash and restricted cash presented in the consolidated statements of cash flows	$	41,587	$	22,973

Schedule of liability deferred revenue

	Years Ended December 31,
(in thousands)	2021			2020
Balance, beginning of year	$	5,439		$	5,510
Deferral of revenue		22,964			16,412
Recognition of unearned revenue		(22,165	)		(16,483	)
Balance, end of year	$	6,238		$	5,439

Schedule of diluted weighted-average shares of common stock outstanding

	December 31,
	2021		2020
Common stock warrants		2,753,408		2,991,499
Stock options		6,583,381		4,211,857
		9,336,789		7,203,356