Nature of Business and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2020

Accounting Policies [Abstract]

Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net

Changes to the allowance for doubtful accounts consisted of the following (in thousands):

	Year Ended December 31,
Allowance for Doubtful Accounts:	2020		2019		2018
Balance at beginning of year	$	45	$	61	$	21
Write-offs	(28)		(6)		—
Change in provision	25		(10)		40
Balance at end of year	$	42	$	45	$	61