Annual report pursuant to Section 13 and 15(d)

BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Deferred Revenue (Details)

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BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Deferred Revenue (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Deferred revenue, current $ 1,372 $ 99
Deferred revenue, net of current portion 5,398 5,886
Contract with Customer, Liability, Total 6,770 5,985
Other accrued liabilities    
Deferred revenue, current $ 1,372 $ 99