v3.21.1
Balance Sheet Account Details - Schedule of Accounts Receivable (Details) - USD ($)
Mar. 31, 2021
Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Accounts receivable, trade $ 4,083,000 $ 4,894,000
Less allowance for doubtful accounts (2,091,000) (2,119,000)
Accounts receivable, net $ 1,992,000 $ 2,775,000