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, 2022	Dec. 31, 2021
The Company and Summary of Significant Accounting Policies
Accounts receivable	$ 29,252,000	$ 34,839,000
Accrued liabilities	18,164,000	17,057,000
Allowance for Doubtful Accounts
The Company and Summary of Significant Accounting Policies
Valuation allowance balance	307,000	130,000
Increase/ (decrease) in allowance for doubtful accounts	177,000	87,000
Allowance for Sales Returns
The Company and Summary of Significant Accounting Policies
Valuation allowance balance	112,000	48,000
Allowance utilized	112,000	48,000
Additional reduction	$ 176,000	$ 15,000