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Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($)	Sep. 30, 2023	Dec. 31, 2022
Allowance for bad debts	$ 681,000	$ 609,000
Preferred stock - par value	$ 0.001	$ 0.001
Preferred stock - shares authorized	5,000,000	5,000,000
Preferred stock - shares issued	0	0
Common stock - par value	$ 0.001	$ 0.001
Common stock - shares authorized	75,000,000	75,000,000
Common stock - shares issued	50,929,132	50,318,726
Common stock - shares outstanding	46,248,409	45,638,003
Treasury Stock, Common, Shares	4,680,723	4,680,723

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