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Income Taxes (Tables)
12 Months Ended
Sep. 30, 2020
Income Tax Disclosure [Abstract]  
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
Year Ended September 30,
202020192018
Federal:
Current$(39)$(1,330)$(2,345)
Deferred9,317 5,908 38,744 
State:
Current3,657 2,312 1,536 
Deferred(4,195)(227)216 
Total provision for income taxes$8,740 $6,663 $38,151 
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
Year Ended September 30,
202020192018
Provision at the statutory rate (1)
$10,352 $8,430 $5,973 
Increase resulting from:
Non-deductible expenses1,974 1,277 1,241 
State income taxes, net of federal deduction2,662 2,009 1,193 
Change in valuation allowance— — 1,761 
Rate change— — 31,333 
Other261 — 183 
Decrease resulting from:
Share-based compensation(75)(556)(238)
Change in valuation allowance(3,334)(83)— 
Contingent tax liabilities(1,313)(3,967)(1,908)
Component 2 goodwill utilization(1,787)(144)— 
State deferred true up— — (1,387)
Other— (303)— 
Total provision for income taxes$8,740 $6,663 $38,151 
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
Year Ended September 30,
20202019
Deferred income tax assets:
Allowance for doubtful accounts$592 $245 
Accrued expenses14,619 9,783 
Net operating loss carryforward22,623 39,045 
Various reserves1,764 1,396 
Equity losses in affiliate210 119 
Share-based compensation897 672 
Capital loss carryforward74 74 
Lease asset7,681 — 
Other2,444 1,137 
Subtotal50,904 52,471 
Less valuation allowance710 4,044 
Total deferred income tax assets50,194 48,427 
Deferred income tax liabilities:
Property and equipment517 840 
Intangible assets7,926 5,978 
Lease liability7,677 — 
Other271 735 
Total deferred income tax liabilities16,391 7,553 
Net deferred income tax assets$33,803 $40,874 
Summary of Income Tax Contingencies [Table Text Block]
Year Ended September 30,
20202019
Balance at beginning of period$26,294 $30,256 
Additions for position related to current year111 93 
Additions for positions of prior years29 19 
Reduction resulting from the lapse of the applicable statutes of limitations1,573 4,074 
Balance at end of period$24,861 $26,294