Annual report pursuant to Section 13 and 15(d)

REVENUE RECOGNITION (Schedule of Changes in Contract Asset and Liability Balances) (Details)

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REVENUE RECOGNITION (Schedule of Changes in Contract Asset and Liability Balances) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Contract assets    
Contract assets, beginning $ 36 $ 67
Contract assets at beginning of year transferred to accounts receivable (36) (43)
Reversal of contract assets due to changes in transaction price (8) (24)
Contract assets recorded on contracts during the period 8 36
Contract assets, ending 0 36
Contract liabilities    
Contract liabilities, beginning 271 146
Recognition of revenue included in beginning of year contract liabilities (209) (138)
Contract liabilities, net of revenue recognized on contracts during the period 1,669 263
Contract liabilities, ending $ 1,731 $ 271