Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Additional Information (Details)

v3.21.1
Stockholders' Equity - Additional Information (Details) - USD ($)
3 Months Ended 9 Months Ended
Mar. 19, 2021
Mar. 10, 2021
Mar. 08, 2021
Mar. 04, 2021
Nov. 23, 2020
Oct. 29, 2020
Sep. 21, 2020
Sep. 03, 2020
Mar. 31, 2021
Dec. 31, 2020
Sep. 30, 2020
Mar. 31, 2020
Mar. 31, 2021
Mar. 31, 2020
Jun. 30, 2020
Apr. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                
Common stock, par value                 $ 0.01       $ 0.01   $ 0.01  
Net proceeds form offering                         $ 75,315,000      
Number of shares authorized to be repurchased (in shares)                               500,000
Number of shares repurchased (in shares)                 0       0      
Dividends declared, date           Oct. 29, 2020   Sep. 03, 2020                
Dividends declared, per common share           $ 1.50   $ 1.50   $ 1.50 $ 1.50          
Dividends payable, date of record           Nov. 23, 2020   Sep. 21, 2020                
Dividends paid                         $ 21,200,000      
New awards grants, expiration date                         Nov. 02, 2027      
Share-based payment arrangement, nonvested award, option, cost not yet recognized, amount                 $ 3,620,118       $ 3,620,118      
Decrease in exercise price of each stock option         $ 1.50   $ 1.50                  
Options                                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                
Share-based payment arrangement, expense                 $ 271,074     $ 215,733 $ 659,342 $ 619,702    
Share-based payment arrangement, nonvested award, cost not yet recognized, period for recognition                         2 years 4 months 24 days      
Incremental stock-based compensation                         $ 0      
2014 Stock Award and Incentive Plan                                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                
Shares granted under the plan (shares)                 107,664       107,664      
Expiration period (in years)                         10 years      
Maximum amount of shares per employee (shares)                         250,000      
2014 Stock Award and Incentive Plan | Director                                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                
Maximum grant date fair value                         $ 300,000      
2014 Stock Award and Incentive Plan | Non-employee Chairman of Board                                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                
Maximum grant date fair value                         $ 600,000      
JMB                                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                
Common stock issued shares, acquisitions 1,047,004                              
Common stock issued value of per share, acquisitions $ 41.6                              
Underwriting Agreement                                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                
Sale of common stock       2,500,000                        
Common stock, par value       $ 0.01                        
Price per share       $ 28.00                        
Shares issued in offering   375,000 2,500,000                          
Gross proceeds form offering                 $ 80,500,000              
Net proceeds form offering                 75,300,000              
Offering costs                 $ 5,200,000              
Underwriting Agreement | Over-Allotment                                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                
Sale of common stock       375,000                        
Common stock, par value       $ 0.01                        
Price per share       $ 28.00