XML 38 R24.htm IDEA: XBRL DOCUMENT v3.21.2
REVENUE (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
REVENUE          
Contract liability balances related to performance obligations $ 272   $ 272   $ 272
Recognized revenue related to contract liability balances 0 $ 0 0 $ 37  
Contract assets $ 0   $ 0   $ 0