Stockholders' Equity	9 Months Ended
Stockholders' Equity	Jun. 30, 2021
Equity [Abstract]
Shareholders' Equity and Share-based Payments [Text Block]	7. STOCKHOLDERS’ EQUITY Equity Incentive Plan The Company’s 2006 Equity Incentive Plan, as amended and restated (the “Equity Incentive Plan”), provides for grants of stock options as well as grants of stock, including restricted stock. Approximately 3.0 million shares of common stock are authorized for issuance under the Equity Incentive Plan, of which approximately 842,141 shares were available for issuance at June 30, 2021. Stock Repurchase Program In 2015, our Board authorized a stock repurchase program for the purchase from time to time of up to 1.5 million shares of the Company’s common stock, and on May 2, 2019, our Board authorized the repurchase from time to time of up to an additional 1.0 million shares of our common stock under the stock repurchase program. Share purchases are made for cash in open market transactions at prevailing market prices or in privately negotiated transactions or otherwise. The timing and amount of purchases under the program are determined based upon prevailing market conditions, our liquidity requirements, contractual restrictions and other factors. All or part of the repurchases may be implemented under a Rule 10b5-1 trading plan, which allows repurchases under predetermined terms at times when the Company might otherwise be prevented from purchasing under insider trading laws or because of self-imposed blackout periods. The program does not require the Company to purchase any specific number of shares and may be modified, suspended or reinstated at any time at the Company’s discretion and without notice. We repurchased no shares of our common stock during the three and nine months ended June 30, 2021. We repurchased 26,711 and 224,959 shares, respectively, of our common stock during the three and nine months ended June 30, 2020 in open market transactions at an average price of $20.29 and $22.32 per share, respectively. Treasury Stock During the nine months ended June 30, 2021, we issued 71,420 shares of common stock from treasury stock to employees and repurchased 32,323 shares of common stock from our employees to satisfy statutory tax withholding requirements upon the vesting of certain performance phantom stock units under the Equity Incentive Plan. In addition, 13,996 restricted shares were forfeited by certain former employees upon their departure and returned to treasury stock. We also issued 380 unrestricted shares of common stock from treasury stock to members of our Board of Directors as part of their overall compensation, and we issued 68,860 shares from treasury stock to satisfy the vesting of Director PSUs (as defined below) in conjunction with the departure of a Board member. During the nine months ended June 30, 2020, we issued 113,408 shares of common stock from treasury stock to employees and repurchased 17,427 shares of common stock from our employees to satisfy statutory tax withholding requirements upon the vesting of certain performance phantom stock units under the Equity Incentive Plan. We also issued 5,225 unrestricted shares of common stock from treasury to members of our Board of Directors as part of their overall compensation and 5,750 unrestricted shares of common stock from treasury stock to satisfy the exercise of outstanding options. In addition, we repurchased 224,959 shares of common stock on the open market pursuant to our stock repurchase program. Restricted Stock We granted no restricted shares to executives during the nine months ended June 30, 2021. Of the awards previously granted, 8,183 shares vested and 13,996 shares were forfeited by certain former employees upon their departure. The remaining restricted shares either vest subject to the achievement of specified levels of cumulative net income before taxes or vest based on the passage of time. During the three months ended June 30, 2021 and 2020, we recognized $36 and $521, respectively, in compensation expense related to all restricted stock awards. During the nine months ended June 30, 2021 and 2020, we recognized $109 and $1,316, respectively, in compensation expense related to all restricted stock awards. At June 30, 2021, the unamortized compensation cost related to outstanding unvested restricted stock was $202. Director Phantom Stock Units Director phantom stock units (“Director PSUs”) are granted to the members of the Board of Directors as part of their overall compensation. The Director PSUs are contractual rights to receive one share of the Company's common stock and are paid via unrestricted stock grants to each director upon their departure from the Board of Directors, or upon a change in control. We record compensation expense for the full value of the grant on the date of grant. During the three months ended June 30, 2021 and 2020, we recognized $93 and $97, respectively, in compensation expense related to these grants. During the nine months ended June 30, 2021 and 2020, we recognized $280 and $293, respectively, in compensation expense related to these grants. Employee Phantom Stock Units An employee phantom stock unit (an “Employee PSU”) is a contractual right to receive one share of the Company’s common stock. Depending on the terms of each grant, Employee PSUs may vest upon the achievement of certain specified performance objectives and continued performance of services, or may vest based on continued performance of services through the vesting date. As of June 30, 2021, the Company had outstanding Employee PSUs, which, subject to the achievement of certain performance metrics, could result in the issuance of 258,253 shares of common stock. Of the Employee PSUs granted, 114,067 Employee PSUs have been forfeited, and 121,102 have vested. During the three months ended June 30, 2021 and 2020, we recognized $928 and $505, respectively, in compensation expense related to Employee PSU grants. During the nine months ended June 30, 2021 and 2020, we recognized $2,336 and $1,121, respectively, in compensation expense related to Employee PSU grants. In July 2021, we issued an additional 22,807 Employee PSUs.