Annual report pursuant to Section 13 and 15(d)

Common Stock and Options - Narrative (Details)

v3.19.3
Common Stock and Options - Narrative (Details) - USD ($)
$ / shares in Units, $ in Thousands
 1 Months Ended 12 Months Ended
Oct. 25, 2018
Sep. 07, 2018
Sep. 05, 2018
Dec. 31, 2016
Nov. 30, 2017
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2016
Oct. 03, 2018
May 31, 2017
Mar. 31, 2017
Feb. 17, 2017
Sep. 30, 2015
Sep. 30, 2013
Class of Stock [Line Items]                              
Number of shares authorized to be repurchased (up to)               7,000,000     2,000,000 5,000,000 50,000 170,000 105,000
Total stock compensation expense           $ 824 $ 2,613 $ 1,653              
Granted (in shares)           10,000 300,000 750,000              
Shares issued (in dollars per share)                   $ 34.00          
Common shares available           227,500 675,000 750,000              
Restricted Stock                              
Class of Stock [Line Items]                              
Award vesting period         2 years 6 months                    
Number of restricted shares awarded         5,000 0 5,000 0              
Weighted average fair value (in dollars per share)         $ 31.95 $ 0 $ 31.95 $ 0              
Total stock compensation expense           $ 104 $ 137 $ 264              
Unrecognized expense           $ 69 $ 172                
Unrecognized compensation cost, expected recognition period           9 months                  
Number of shares vested           1,667 3,001 4,933              
Aggregate value of shares vested           $ 53                  
Options                              
Class of Stock [Line Items]                              
Total stock compensation expense           674 $ 1,617 $ 616              
Unrecognized expense           $ 502 $ 2,174                
Unrecognized compensation cost, expected recognition period           1 year 3 months 14 days                  
2019 Option Grants                              
Class of Stock [Line Items]                              
Shares issued (in dollars per share) $ 33.34                            
Number of awards vesting (in shares)           0                  
Period following an executive's termination of employment for a number of reasons 18 months                            
Period following an executive's termination of employment without cause 12 months                            
Share price (in dollars per share)           $ 34.02                  
2019 Option Grants | John Kiernan                              
Class of Stock [Line Items]                              
Granted (in shares) 10,000                            
2019 Option Grants | Tranche One                              
Class of Stock [Line Items]                              
Number of awards vesting (in shares) 3,333                            
Period of consecutive trading days 20 days                            
Amount per share (in dollars per share) $ 40.00                            
2019 Option Grants | Tranche Two                              
Class of Stock [Line Items]                              
Number of awards vesting (in shares) 3,333                            
Period of consecutive trading days 20 days                            
Amount per share (in dollars per share) $ 45.00                            
2019 Option Grants | Tranche Three                              
Class of Stock [Line Items]                              
Number of awards vesting (in shares) 3,334                            
Period of consecutive trading days 20 days                            
Amount per share (in dollars per share) $ 50.00                            
2019 Option Grants | Options                              
Class of Stock [Line Items]                              
Grants in period, weighted average (in dollars per share)           7.10                  
2019 Option Grants | Maximum                              
Class of Stock [Line Items]                              
Share price (in dollars per share)           $ 40.00                  
2018 Option Grants                              
Class of Stock [Line Items]                              
Total stock compensation expense           $ (823)                  
Shares issued (in dollars per share)   $ 33.60                          
Number of awards vesting (in shares)           0                  
Period following an executive's termination of employment for a number of reasons   18 months                          
Period following an executive's termination of employment without cause   12 months                          
Share price (in dollars per share)           $ 34.02                  
2018 Option Grants | John Kiernan                              
Class of Stock [Line Items]                              
Granted (in shares)   90,000                          
2018 Option Grants | Remy W. Trafelet                              
Class of Stock [Line Items]                              
Granted (in shares)   210,000                          
Award expiration period           6 months                  
2018 Option Grants | Tranche One                              
Class of Stock [Line Items]                              
Period of consecutive trading days   20 years                          
Amount per share (in dollars per share)   $ 35.00                          
Percentage of options   25.00%                          
2018 Option Grants | Tranche One | Remy W. Trafelet                              
Class of Stock [Line Items]                              
Period of consecutive trading days           20 days                  
Amount per share (in dollars per share)           $ 35.00                  
Number of shares expected to vest           26,250                  
2018 Option Grants | Tranche Two                              
Class of Stock [Line Items]                              
Period of consecutive trading days   20 years                          
Amount per share (in dollars per share)   $ 40.00                          
Percentage of options   25.00%                          
2018 Option Grants | Tranche Two | Remy W. Trafelet                              
Class of Stock [Line Items]                              
Period of consecutive trading days           20 days                  
Amount per share (in dollars per share)           $ 40.00                  
Number of shares expected to vest           26,250                  
2018 Option Grants | Tranche Three                              
Class of Stock [Line Items]                              
Period of consecutive trading days   20 years                          
Amount per share (in dollars per share)   $ 45.00                          
Percentage of options   25.00%                          
2018 Option Grants | Tranche Four                              
Class of Stock [Line Items]                              
Period of consecutive trading days   20 years                          
Amount per share (in dollars per share)   $ 50.00                          
Percentage of options   25.00%                          
2018 Option Grants | Options                              
Class of Stock [Line Items]                              
Grants in period, weighted average (in dollars per share)             $ 7.40                
2018 Option Grants | Maximum                              
Class of Stock [Line Items]                              
Share price (in dollars per share)           $ 35.00                  
2016 Option Grants                              
Class of Stock [Line Items]                              
Unrecognized expense             $ 783                
Shares issued (in dollars per share)       $ 27.15                      
Number of awards vesting (in shares)           0                  
Period of consecutive trading days       20 days                      
Period following an executive's termination of employment for a number of reasons       18 months                      
Share price (in dollars per share)           $ 34.02                  
2016 Option Grants | Remy W. Trafelet                              
Class of Stock [Line Items]                              
Granted (in shares)       300,000                      
2016 Option Grants | Henry R. Slack                              
Class of Stock [Line Items]                              
Granted (in shares)       225,000                      
Shares forfeited     187,500                        
2016 Option Grants | George R. Brokaw                              
Class of Stock [Line Items]                              
Granted (in shares)       225,000                      
Shares forfeited     187,500                        
2016 Option Grants | Tranche One                              
Class of Stock [Line Items]                              
Amount per share (in dollars per share)       $ 60.00                      
Percentage of options       25.00%                      
2016 Option Grants | Tranche Two                              
Class of Stock [Line Items]                              
Amount per share (in dollars per share)       $ 75.00                      
Percentage of options       25.00%                      
2016 Option Grants | Tranche Three                              
Class of Stock [Line Items]                              
Amount per share (in dollars per share)       $ 90.00                      
Percentage of options       25.00%                      
2016 Option Grants | Tranche Four                              
Class of Stock [Line Items]                              
Amount per share (in dollars per share)       $ 105.00                      
Percentage of options       25.00%                      
2016 Option Grants | Options                              
Class of Stock [Line Items]                              
Grants in period, weighted average (in dollars per share)                 $ 3.53            
2016 Option Grants | Maximum                              
Class of Stock [Line Items]                              
Share price (in dollars per share)           60.00                  
2019 Modified Option Grants | Options                              
Class of Stock [Line Items]                              
Grants in period, weighted average (in dollars per share)           $ 1.40                  
2015 Option Grants                              
Class of Stock [Line Items]                              
Number of shares authorized to be repurchased (up to)           1,250,000                  
2015 Option Grants | Options                              
Class of Stock [Line Items]                              
Common shares available           1,005,000                  
2015 Option Grants | Minimum                              
Class of Stock [Line Items]                              
Award vesting period           1 year                  
2015 Option Grants | Maximum                              
Class of Stock [Line Items]                              
Award vesting period           6 years