The Company and Summary of Significant Accounting Policies - Accounts Receivable and Allowance for Doubtful Accounts and Sales Returns (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
The Company and Summary of Significant Accounting Policies
Accounts receivable	$ 19,256,000	$ 29,252,000
Allowance for Doubtful Accounts
The Company and Summary of Significant Accounting Policies
Valuation allowance balance	579,000	307,000
Increase/ (decrease) in allowance for doubtful accounts	272,000	177,000
Allowance for Sales Returns
The Company and Summary of Significant Accounting Policies
Valuation allowance balance	39,000	112,000
Allowance utilized	39,000	112,000
Additional reduction	$ 34,000	$ 176,000