Annual report pursuant to Section 13 and 15(d)

Consolidated Balance Sheets (Parenthetical)

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Consolidated Balance Sheets (Parenthetical) - USD ($)
Dec. 31, 2021
Dec. 31, 2020
Statement of Financial Position [Abstract]    
Accounts receivable, allowance for credit loss, current $ 581,000 $ 192,000
Notes receivable, allowance for credit loss, current $ 522,000 $ 292,000
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized (in shares) 100,000,000 100,000,000
Common stock, shares, issued (in shares) 59,928,564 57,150,998
Common stock, shares, outstanding (in shares) 59,928,564 57,150,998