Shareholders' Equity (Details 2) (USD $)	6 Months Ended
	Jun. 30, 2013
Summary of stock option activity under the plans
Number of Shares, Beginning Balance	1,539,618
Weighted Average Exercise Price, Beginning Balance	$ 3.55
Granted at fair value, Number of Shares	172,530
Granted at fair value, Weighted Average Exercise Price	$ 3.11
Exercised, Number of Shares	(3,000)
Exercised, Weighted Average Exercise Price	$ 2.67
Forfeited, Number of Shares	(30,622)
Forfeited, Weighted Average Exercise Price	$ 3.58
Expired, Number of Shares	(68,339)
Expired, Weighted Average Exercise Price	$ 4.53
Number of Shares, Ending Balance	1,610,187
Weighted Average Exercise Price, Ending Balance	$ 3.47
Weighted Average Remaining Contractual Life (in years), Balance at June 30, 2013	3 years 10 months 21 days
Aggregate Intrinsic Value	$ 251,000
Vested and expected to vest, Number of Shares, at June 30, 2013	1,551,976
Vested and expected to vest, Weighted Average Exercise Price, at June 30, 2013	$ 3.47
Vested and expected to vest, Weighted Average Remaining Contractual Life (in years)	3 years 9 months 22 days
Vested and expected to vest, Aggregate Intrinsic Value	251,000
Exercisable, Number of Shares at June 30, 2013	1,200,936
Exercisable, Weighted Average Exercise Price, at June 30, 2013	$ 3.46
Exercisable, Weighted Average Remaining Contractual Life (in years)	3 years 1 month 2 days
Exercisable, Aggregate Intrinsic Value	$ 247,000