Stock Compensation Plans (Details) (USD $)	3 Months Ended		12 Months Ended		0 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Mar. 10, 2015	Sep. 09, 2014	Mar. 04, 2014	Aug. 05, 2013	Mar. 04, 2013	Dec. 09, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options exercisable outstanding (in shares)	210,284		219,285
Expected term of stock options in Black-Scholes option pricing model, previous	4 years
Expected term of stock options in Black-Scholes option pricing model, revised	2 years
Options Exercisable at [Abstract]
March 31, 2015 (in shares)	210,284		219,285
Options Weighted Average Option Exercise Price at [Abstract]
Decrease in income from continuing operations due to change in accounting pronouncement	$ 752,000	$ 192,000
Decrease in net income due to change in accounting pronouncement	$ 469,000	$ 119,000
Net income (loss) per share after change in accounting pronouncement, basic (in dollars per share)	$ 0.71	$ 0.78
Net income (loss) per share after change in accounting pronouncement, diluted (in dollars per share)	$ 0.69	$ 0.75
Net income (loss) per share - basic (in dollars per share)	$ 0.68	$ 0.77
Net income per share - diluted (in dollars per share)	$ 0.66	$ 0.74
1998 Stock Option Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized to grant options to purchase (in shares)	900,000	900,000
Share-based payment award, expiration date	Sep. 30, 2008
Stock Option Plans, Number of Shares [Abstract]
Outstanding, beginning of period (in shares)	0	3,000	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	$ 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)	153,584
Stock Option Plans, Number of Shares [Abstract]
Outstanding, beginning of period (in shares)	219,285	523,521	523,521	702,597
Granted (in shares)	0		0	0
Exercised (in shares)	(9,001)		299,735	(165,577)
Cancelled (in shares)	0		(4,501)	(13,499)
Outstanding, end of period (in shares)	210,284		219,285	523,521
Stock Options, Weighted Average Option Exercise Price [Abstract]
Outstanding, beginning of period (in dollars per share)	$ 3.79	$ 4.54	$ 4.54	$ 5.17
Granted (in dollars per share)	$ 0		$ 0	$ 0
Exercised (in dollars per share)	$ 2.98		$ 5.10	$ 7.15
Cancelled (in dollars per share)	$ 0		$ 3.49	$ 5.41
Outstanding, end of period (in dollars per share)	$ 3.98		$ 3.79	$ 4.54
Options Exercisable at [Abstract]
March 31, 2015 (in shares)	153,584
December 31, 2015 (in shares)	56,700
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)	210,284
Options Weighted Average Option Exercise Price at [Abstract]
March 31, 2014 (in dollars per share)	$ 3.83
December 31, 2014 (in dollars per share)	$ 3.83
December 31, 2015 (in dollars per share)	$ 3.83
December 31, 2016 (in dollars per share)	$ 3.83
December 31, 2017 (in dollars per share)	$ 3.83
December 31, 2018 (in dollars per share)	$ 3.83
Thereafter (in dollars per share)	$ 3.83
Summary information about stock options outstanding [Abstract]
Range of Exercise Price, Minimum (in dollars per share)	$ 2.45
Range of Exercise Price, Maximum (in dollars per share)	$ 4.40
Options Outstanding (in shares)	210,284
Weighted Average Contractual Periods in Years	6 years 4 months 28 days
Weighted Average Exercise Price (in dollars per share)	$ 3.83
Options Exercisable (in shares)	153,584
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]
Outstanding, beginning of period (in shares)	447,801	249,500	249,500	0
Granted (in shares)	66,140		268,648	250,000	66,140	130,000	88,648	150,000	100,000
Exercised (in shares)	(59,707)		(68,988)	0
Cancelled (in shares)	0		(1,359)	(500)
Outstanding, end of period (in shares)	454,234		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	$ 5.54	$ 0
Granted (in dollars per share)	$ 28.79		$ 5.54	$ 5.54
Exercised (in dollars per share)	$ 10.47		$ 0	$ 0
Cancelled (in dollars per share)	$ 0		$ 5.54	$ 5.54
Outstanding, end of period (in dollars per share)	$ 19.41		$ 5.54	$ 5.54
2012 Stock Incentive Plan [Member] | Chief Executive Officer and President [Member]
Other Than Stock Option Plans, Number of Shares [Abstract]
Granted (in shares)					32,997	45,000	43,997	100,000	25,000	50,000
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