ACCOUNTS RECEIVABLE (Tables)

6 Months Ended

12 Months Ended

Jun. 30, 2021

Dec. 31, 2020

ACCOUNTS RECEIVABLE

Schedule of accounts receivable

The components of accounts receivable are as follows (in thousands):

	June 30,		December 31,
	2021		2020
Trade receivables	$	13,750	$	7,016
Allowance for doubtful accounts		(309)		(500)
Total accounts receivable	$	13,441	$	6,516

The components of accounts receivable are as follows (in thousands):

	December 31,
	2020		2019
Trade receivables	$	7,016	$	4,722
Allowance for doubtful accounts		(500)		(199)
Total accounts receivable	$	6,516	$	4,523

Schedule of allowance for doubtful accounts

The following table summarizes activity in the allowance for doubtful accounts (in thousands):

	June 30,		December 31,
	2021		2020
Balance at beginning of period	$	500	$	199
Provision for uncollectible accounts		(164)		377
Uncollectible accounts written off		(27)		(76)
Balance at end of period	$	309	$	500

The following table summarizes activity in the allowance for doubtful accounts (in thousands):

	Years Ended December 31,
	2020		2019
Balance at beginning of year	$	199	$	—
Provision for uncollectible accounts		377		199
Uncollectible accounts written off		(76)		—
Balance at end of year	$	500	$	199