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Stock-Based Compensation (Details) - USD ($)
3 Months Ended
Nov. 12, 2020
Nov. 15, 2018
Feb. 02, 2018
Sep. 27, 2010
Sep. 30, 2022
Sep. 30, 2021
Nov. 21, 2006
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Common stock issued under employee stock purchase plan (in shares)         36,000 27,000  
Stock based compensation reflected in additional paid in capital         $ 600,000 $ 600,000  
2007 Long-Term Incentive Plan              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of shares authorized (in shares)             1,400,000
2010 Long-Term Incentive Plan              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of shares authorized (in shares)     475,000 1,000,000      
Contractual term of stock options granted       10 years      
Options outstanding, net of awards expired (in shares)         14,000    
2010 Long-Term Incentive Plan | Minimum              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Right to purchase common stock, minimum price (in USD per share)       $ 9.31      
Share based payment award, vesting period       1 year      
2010 Long-Term Incentive Plan | Maximum              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share based payment award, vesting period       4 years      
2017 Long-Term Incentive Plan              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of shares authorized (in shares)         2,900,000    
Share based payment award, vesting period         3 years    
Options outstanding, net of awards expired (in shares)         100,000    
Number of additional shares authorized (in shares) 650,000 715,000 425,000        
Right to purchase common stock, non-vested and outstanding, exercise price (in USD per share)         $ 4.44    
2017 Long-Term Incentive Plan Excluding 2010 Long-Term Incentive Plan              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of shares authorized (in shares)     2,440,000        
Employee Stock Purchase Plan              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Common Stock, capital shares reserved for future issuance (in shares)         400,000    
Shares available for issuance under the ESPP (in shares)         200,000    
Purchase price of common stock (as a percent)         85.00%    
Maximum employee subscription rate (as a percent)         15.00%    
Maximum number of shares per employee (in shares)         3,000    
Amount in excess of fair market value of stock for option not to be granted         $ 25,000    
Offering period         6 months