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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Sep. 30, 2022
Accounting Policies [Abstract]  
Accounts Receivable, Allowance for Credit Loss The following table presents a reconciliation of the allowance for credit losses (in thousands):
Year ended September 30,
20222021
Balance at beginning of period$3,934 $3,778 
Additions1,475 2,803 
Uncollectible accounts charged to allowance, net of recoveries(2,124)(2,647)
Balance at end of period$3,285 $3,934 
Schedule of Calculation of Numerator and Denominator in Earnings Per Share The following table is a reconciliation of the numerators and denominators in the net income per common share calculations (in thousands, except per common share data):
 Year ended September 30,
 202220212020
Numerator:   
Net income$19,383 $10,366 $8,411 
Denominator:
Denominator basic net income per common share — weighted average shares outstanding35,031 32,111 28,849 
Effect of dilutive securities:
Stock options and restricted stock units964 1,283 697 
Denominator diluted net income per common share — adjusted weighted average shares35,995 33,394 29,546 
Net income per common share, basic$0.55 $0.32 $0.29 
Net income per common share, diluted$0.54 $0.31 $0.28