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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands | Jun. 30, 2021 | Sep. 30, 2020
--- | --- | ---
Current assets: |  |
Restricted cash | $ 1,907 | $ 3,497
Allowance for uncollectible amounts, accounts receivable | $ 3,831 | $ 8,359
Stockholders' equity: |  |
Preferred stock, par value | $ 0.003 | $ 0.003
Preferred stock, shares authorized | 10,000,000 | 10,000,000
Preferred stock, shares issued | 0 | 0
Common stock, par value | $ 0.001455 | $ 0.001455
Common stock, shares authorized | 150,000,000 | 150,000,000
Common stock, shares issued | 72,960,000 | 72,960,000
Treasury stock, shares | 9,361,000 | 10,277,000
Treasury stock held for deferred compensation, shares | 173,000 | 199,000

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