Quarterly report pursuant to Section 13 or 15(d)

ACCOUNTS RECEIVABLE - Allowance for doubtful accounts (Details)

v3.21.2
ACCOUNTS RECEIVABLE - Allowance for doubtful accounts (Details) - USD ($)
$ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
ACCOUNTS RECEIVABLE      
Balance at beginning of period $ 500 $ 199 $ 199
Provision for uncollectible accounts (164) $ (285) 377
Uncollectible accounts written off (27)   (76)
Balance at end of period $ 309   $ 500