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Stock-Based Incentive Plan - Narrative (Details) - USD ($)
3 Months Ended 6 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 08, 2016
Restricted Stock and Contingent Restricted Stock          
Stock-Based Incentive Plan          
Stock-based compensation expense $ 254,111 $ 484,326 $ 469,484 $ 971,810  
Restricted Stock, Market-Based          
Stock-Based Incentive Plan          
Granted (in shares)     43,990    
2016 Plan          
Stock-Based Incentive Plan          
Number of shares of common stock authorized for issuance under plan         1,100,000
Number of shares remaining available for grant under plan 852,111   852,111    
2004 Stock Plan | Restricted Stock and Contingent Restricted Stock, Other Awards [Member]          
Stock-Based Incentive Plan          
Vesting period     1 year    
Minimum | 2004 Stock Plan | Restricted Stock, Market-Based          
Stock-Based Incentive Plan          
Vesting period     2 years    
Maximum | 2004 Stock Plan | Restricted Stock and Contingent Restricted Stock          
Stock-Based Incentive Plan          
Expiration period     4 years    
Maximum | 2004 Stock Plan | Restricted Stock, Service-Based          
Stock-Based Incentive Plan          
Vesting period     4 years    
Maximum | 2004 Stock Plan | Restricted Stock, Market-Based          
Stock-Based Incentive Plan          
Vesting period     3 years    
Employees [Member] | 2004 Stock Plan | Restricted Stock, Service-Based          
Stock-Based Incentive Plan          
Granted (in shares)     31,777    
Employees [Member] | 2004 Stock Plan | Restricted Stock, Market-Based          
Stock-Based Incentive Plan          
Granted (in shares)     43,990    
Employees [Member] | Minimum | 2004 Stock Plan | Restricted Stock, Service-Based          
Stock-Based Incentive Plan          
Vesting period     3 years    
Director [Member] | 2004 Stock Plan | Restricted Stock, Service-Based          
Stock-Based Incentive Plan          
Granted (in shares)     35,215    
Director [Member] | Minimum | 2004 Stock Plan | Restricted Stock, Service-Based          
Stock-Based Incentive Plan          
Vesting period     1 year