Annual report pursuant to Section 13 and 15(d)

Stock Options, Stock Grants and New Stock (Narrative) (Details)

v3.3.1.900
Stock Options, Stock Grants and New Stock (Narrative) (Details) - USD ($)
12 Months Ended
Feb. 19, 2016
May. 12, 2015
Feb. 10, 2015
Jan. 05, 2015
Nov. 21, 2014
Oct. 16, 2014
Apr. 24, 2014
Feb. 20, 2014
Apr. 25, 2013
Feb. 07, 2013
Dec. 31, 2015
Jan. 03, 2015
Dec. 28, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Options granted, weighted average fair value (dollars per share)                     $ 6.57 $ 6.76 $ 7.19
Exercised (shares)                     666 17,074 15,247
Shares of common stock purchased                     100,400    
Options exercisable (shares)                     88,025    
Options exercisable, weighted average exercise price (dollars per share)                     $ 11.85    
Share-based compensation expense                     $ 521,695 $ 364,157 $ 331,362
Issuance of shares of common stock from the treasury (in shares)                     26,118 14,522 17,572
Issuance of common stock (shares)                     0 0 2,300,000
Stock Options [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Exercised (shares)                     666 17,074 15,247
Option exercises, aggregate exercise price                     $ 8,000 $ 192,000 $ 163,000
Cash received from exercise of stock options                     $ 8,000 $ 42,000 $ 138,000
Shares of common stock purchased                       9,094 1,752
Stock repurchased during year                       $ 150,000 $ 25,000
Options exercisable (shares)                     88,025 56,787 40,591
Options exercisable, weighted average exercise price (dollars per share)                     $ 11.85 $ 11.73 $ 11.26
Share-based compensation expense                     $ 278,000 $ 261,000 $ 249,000
Total unrecognized compensation cost                     $ 319,000    
Share-based compensation, weighted average period of recognition (years)                     3 years 2 days    
2011 Plan [Member] | Stock Options [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Options granted (shares)     32,532         13,790   40,594      
Options granted, weighted average exercise price (dollars per share)     $ 16.01         $ 14.76   $ 13.70      
Options granted, weighted average fair value (dollars per share)     $ 6.39         $ 6.70   $ 6.30      
Risk free interest rate (percent)     2.00%         2.00%   2.00%      
Expected volatility rate (percent)     46.00%         52.00%   53.00%      
Expected life (years)     7 years         7 years   7 years      
Expected dividend yield (percent)     2.00%         1.80%   1.80%      
Annual vesting rate (percent)     20.00%                    
2005 Stock Awards Plan [Member] | Stock Awards [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Annual vesting rate (percent)                     20.00%    
Share-based compensation expense                     $ 243,000 103,000 82,000
Total unrecognized compensation cost                     $ 711,000    
Share-based compensation, weighted average period of recognition (years)                     3 years 9 months 27 days    
Period after grant date, awards vesting begins (years)                     1 year    
Share-based compensation expense, period of recognition (years)                     60 months    
Share-based compensation expense, net of taxes                     $ 155,000 $ 66,000 $ 52,000
Share-based compensation expense, net of taxes, (dollars per share)                     $ 0.02 $ 0.01 $ 0.01
2015 Stock Awards Plan [Member] | Stock Awards [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Annual vesting rate (percent)                     20.00%    
Period after grant date, awards vesting begins (years)                     1 year    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized                     250,000    
External Consultants [Member] | 2005 Stock Awards Plan [Member] | Stock Awards [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Granted (shares)       3,000                  
Granted, weighted average grant date fair value (dollars per share)       $ 17.95                  
Chief Executive Officer [Member] | 2005 Stock Awards Plan [Member] | Stock Awards [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Granted (shares)           31,080              
Granted, weighted average grant date fair value (dollars per share)           $ 15.69              
Non Employee Director [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Issuance of shares of common stock from the treasury (in shares)   8,216         7,088   9,411        
Annual cash retainer fees   $ 119,000         $ 111,000   $ 128,000        
Restricted Stock [Member] | Non Employee Director [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Maximum annual retainer percent                     100.00%    
Specialty Pipe And Tube, Inc. [Member] | Certain Management Employees [Member] | 2005 Stock Awards Plan [Member] | Stock Awards [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Granted (shares)         23,665                
Granted, weighted average grant date fair value (dollars per share)         $ 15.85                
Subsequent Event [Member] | 2015 Stock Awards Plan [Member] | Stock Awards [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Annual vesting rate (percent) 20.00%                        
Granted (shares) 50,062                        
Granted, weighted average grant date fair value (dollars per share) $ 7.51                        
Period after grant date, awards vesting begins (years) 1 year