Stock-Based Compensation (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized under the plan (in shares)	500,000
Stock-based compensation expense	$ 34,000	$ 59,000
Shares [Roll Forward]
Options outstanding, Beginning period (in shares)	328,200
Options granted (in shares)	0	0
Options exercised (in shares)	(20,500)	0
Options forfeited (in shares)	(49,400)
Options outstanding, Ending period (in shares)	258,300
Options exercisable, Ending period (in shares)	75,901
Weighted Average Price [Roll Forward]
Options outstanding, Beginning period (in dollars per share)	$ 4.33
Options granted (in dollars per share)	$ 0
Options exercised (in dollars per share)	$ 4.53
Options forfeited (in dollars per share)	$ 4.13
Options outstanding, Ending period (in dollars per share)	$ 4.36
Options exercisable, Ending period (in dollars per share)	$ 4.12
Aggregate intrinsic value of the options outstanding	162,694		122,160
Aggregate intrinsic value of the options exercisable	65,000		60,000
Nonvested Options, Shares [Roll Forward]
Nonvested options outstanding, Beginning balance (in shares)	198,505
Nonvested options granted (in shares)	0
Nonvested options vested (in shares)	(16,106)
Nonvested options forfeited (in shares)	0
Nonvested options outstanding, Ending balance (in shares)	182,399
Nonvested Options, Weighted Average Grant Date Exercise Price [Roll Forward]
Nonvested options outstanding, Beginning balance (in dollars per share)	$ 4.44
Nonvested options granted (in dollars per share)	$ 0
Nonvested options vested (in dollars per share)	$ 4.34
Nonvested options forfeited (in dollars per share)	$ 0
Nonvested options outstanding, Ending balance (in dollars per share)	$ 4.45
Unrecognized stock-based compensation expense	$ 493,000
Unrecognized stock-based compensation expected to be recognized period	55 months
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options expiry period	10 years
Stock options vesting period	5 years