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Stock Compensation Plans (Details) - $ / shares
9 Months Ended 12 Months Ended
May. 05, 2015
Mar. 10, 2015
Dec. 09, 2014
Sep. 09, 2014
Mar. 04, 2014
Aug. 05, 2013
Mar. 04, 2013
Sep. 30, 2015
Dec. 31, 2014
Dec. 31, 2013
1998 Stock Option Plan [Member] | Stock Option [Member]                    
Stock Option Plans, Number of Shares [Abstract]                    
Outstanding, beginning of period (in shares)               0 3,000 78,500
Granted (in shares)               0 0 0
Exercised (in shares)               0 (3,000) (500)
Cancelled (in shares)               0 0 (75,000)
Outstanding, end of period (in shares)               0 0 3,000
Stock Options, Weighted Average Option Exercise Price [Abstract]                    
Outstanding, beginning of period (in dollars per share)               $ 8.67 $ 8.67 $ 12.73
Granted (in dollars per share)               0 0 0
Exercised (in dollars per share)               0 8.67 8.67
Cancelled (in dollars per share)               0 0 12.92
Outstanding, end of period (in dollars per share)               $ 0 $ 8.67 $ 8.67
2002 Stock Option Plan [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Shares authorized to grant options to purchase (in shares)               1,800,000 1,800,000  
Share-based payment award, expiration date               Apr. 30, 2012    
Options exercisable outstanding (in shares)               185,150 219,285  
Options Exercisable at [Abstract]                    
September 30, 2015 (in shares)               185,150 219,285  
2002 Stock Option Plan [Member] | Stock Option [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Options exercisable outstanding (in shares)               184,150    
Stock Option Plans, Number of Shares [Abstract]                    
Outstanding, beginning of period (in shares)               219,285 523,521 702,597
Granted (in shares)               0 0 0
Exercised (in shares)               (34,135) (299,735) (165,577)
Cancelled (in shares)               0 (4,501) (13,499)
Outstanding, end of period (in shares)               185,150 219,285 523,521
Stock Options, Weighted Average Option Exercise Price [Abstract]                    
Outstanding, beginning of period (in dollars per share)               $ 3.79 $ 4.54 $ 5.17
Granted (in dollars per share)               0 0 0
Exercised (in dollars per share)               3.81 5.10 7.15
Cancelled (in dollars per share)               0 3.49 5.41
Outstanding, end of period (in dollars per share)               $ 3.79 $ 3.79 $ 4.54
Options Exercisable at [Abstract]                    
September 30, 2015 (in shares)               184,150    
December 31, 2015 (in shares)               1,000    
December 31, 2016 (in shares)               0    
December 31, 2017 (in shares)               0    
December 31, 2018 (in shares)               0    
December 31, 2019 (in shares)               0    
Thereafter (in shares)               0    
Total options exercisable (in shares)               185,150    
Options Weighted Average Option Exercise Price at [Abstract]                    
September 30, 2015 (in dollars per share)               $ 3.79    
December 31, 2015 (in dollars per share)               3.79    
December 31, 2016 (in dollars per share)               3.79    
December 31, 2017 (in dollars per share)               3.79    
December 31, 2018 (in dollars per share)               3.79    
December 31, 2019 (in dollars per share)               3.79    
Thereafter (in dollars per share)               $ 3.79    
2012 Stock Incentive Plan [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Shares authorized to grant options to purchase (in shares)               1,000,000    
Share-based payment award, expiration date               Apr. 05, 2022    
Other Than Stock Option Plans, Number of Shares [Abstract]                    
Granted (in shares)   66,140   130,000 88,648 150,000 100,000      
2012 Stock Incentive Plan [Member] | Chief Executive Officer and President [Member]                    
Other Than Stock Option Plans, Number of Shares [Abstract]                    
Granted (in shares) 50,000 32,997 50,000 45,000 43,997 100,000 25,000      
2012 Stock Incentive Plan [Member] | Chief Financial Officer [Member]                    
Other Than Stock Option Plans, Number of Shares [Abstract]                    
Granted (in shares)   9,551   15,000 16,341 50,000 15,000      
2012 Stock Incentive Plan [Member] | Director [Member]                    
Other Than Stock Option Plans, Number of Shares [Abstract]                    
Granted (in shares)   6,252   50,000 15,710   20,000      
2012 Stock Incentive Plan [Member] | Other Employees [Member]                    
Other Than Stock Option Plans, Number of Shares [Abstract]                    
Granted (in shares)   17,340   20,000 12,600   40,000      
2012 Stock Incentive Plan [Member] | Stock Option [Member]                    
Other Than Stock Option Plans, Number of Shares [Abstract]                    
Outstanding, beginning of period (in shares)               447,801 249,500 0
Granted (in shares)               116,140 268,648 250,000
Exercised (in shares)               (135,134) (68,988) 0
Cancelled (in shares)               0 (1,359) (500)
Outstanding, end of period (in shares)               428,807 447,801 249,500
Other Than Stock Options, Fair Market Value at Grant [Abstract]                    
Outstanding, beginning of period (in dollars per share)               $ 5.54 $ 5.54 $ 0
Granted (in dollars per share)               26.81 5.54 5.54
Exercised (in dollars per share)               16.03 0 0
Cancelled (in dollars per share)               0 5.54 5.54
Outstanding, end of period (in dollars per share)               $ 14.57 $ 5.54 $ 5.54