Shareholders' Equity (Details 4) (USD $)	12 Months Ended		1 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	May 31, 2014
Information by exercise price range
Options Outstanding, Number Outstanding (in shares)	1,255,077		1,255,077
Options Outstanding, Weighted Average Remaining Contractual Life	7 years 3 months 15 days
Options Outstanding, Weighted Average Exercise Price Per Share	$ 2.86		$ 2.86
Options Exercisable, Number Exercisable (in shares)	710,598	686,998	710,598
Options Exercisable, Weighted Average Exercise Price Per Share	$ 3.01		$ 3.01
Stock option disclosures
Aggregate intrinsic value of options outstanding (in dollars)	$ 1,186,000		$ 1,186,000
Weighted average remaining life of options exercisable	6 years 4 days
Aggregate intrinsic value of options exercisable (in dollars)	685,000		685,000
Weighted average grant-date fair value of options granted (in dollars per share)	$ 1.13	$ 1.01
Total number of shares granted to the Board of directors (in shares)	29,701	39,032
Restricted stock units granted (in shares)	25,000
Restricted stock units
Stock option disclosures
Vesting period				3 years
Restricted stock units granted (in shares)	25,000
Fair value of units			$ 3.03
$1.61 - $2.46
Information by exercise price range
Ranges of Exercise Prices, Lower (in dollars per share)	$ 1.61
Ranges of Exercise Prices, Upper (in dollars per share)	$ 2.46
Options Outstanding, Number Outstanding (in shares)	532,831		532,831
Options Outstanding, Weighted Average Remaining Contractual Life	7 years 4 months 24 days
Options Outstanding, Weighted Average Exercise Price Per Share	$ 1.85		$ 1.85
Options Exercisable, Number Exercisable (in shares)	351,852		351,852
Options Exercisable, Weighted Average Exercise Price Per Share	$ 1.80		$ 1.80
$2.79 - $4.22
Information by exercise price range
Ranges of Exercise Prices, Lower (in dollars per share)	$ 2.79
Ranges of Exercise Prices, Upper (in dollars per share)	$ 4.22
Options Outstanding, Number Outstanding (in shares)	621,246		621,246
Options Outstanding, Weighted Average Remaining Contractual Life	7 years 9 months 4 days
Options Outstanding, Weighted Average Exercise Price Per Share	$ 3.30		$ 3.30
Options Exercisable, Number Exercisable (in shares)	257,746		257,746
Options Exercisable, Weighted Average Exercise Price Per Share	$ 3.69		$ 3.69
$5.49
Information by exercise price range
Exercise price (in dollars per share)	$ 5.49
Options Outstanding, Number Outstanding (in shares)	101,000		101,000
Options Outstanding, Weighted Average Remaining Contractual Life	3 years 10 months 13 days
Options Outstanding, Weighted Average Exercise Price Per Share	$ 5.49		$ 5.49
Options Exercisable, Number Exercisable (in shares)	101,000		101,000
Options Exercisable, Weighted Average Exercise Price Per Share	$ 5.49		$ 5.49
2013 Plan
Stock option disclosures
Total number of shares granted to the Board of directors (in shares)	29,701	39,032
Shares issue price (in dollars per share)	$ 3.03	$ 2.69	$ 3.03
Total value of shares issued	$ 90,000	$ 105,000