Stock Purchase Warrants (Details 1) (USD $)	6 Months Ended
	Jun. 30, 2013
Exercise price	$ 1.99
Warrants Outstanding	1,632,501
Warrants Exercisable	1,432,501
Weighted Average Remaining Contractual Life	3 years 3 months 11 days
Aggregate Intrinsic value	$ 141,000
Warrant [Member] | Exercise Price 1.14 [Member]
Exercise price	$ 1.14
Warrants Outstanding	100,000
Warrants Exercisable	100,000
Weighted Average Remaining Contractual Life	3 years 7 months 2 days
Aggregate Intrinsic value	$ 58,000
Warrant [Member] | Exercise Price 1.32 [Member]
Exercise price	$ 1.32
Warrants Outstanding	18,182
Warrants Exercisable	18,182
Weighted Average Remaining Contractual Life	2 years 6 months
Aggregate Intrinsic value	$ 7,000
Warrant [Member] | Exercise Price 1.60 [Member]
Exercise price	$ 1.60
Warrants Outstanding	635,855
Warrants Exercisable	635,855
Weighted Average Remaining Contractual Life	4 years 3 months 29 days
Aggregate Intrinsic value	$ 76,000
Warrant [Member] | Exercise Price 2.20 [Member]
Exercise price	$ 2.20
Warrants Outstanding	250,000
Warrants Exercisable	50,000
Weighted Average Remaining Contractual Life	8 months 16 days
Warrant [Member] | Exercise Price 2.22 [Member]
Exercise price	$ 2.22
Warrants Outstanding	517,257
Warrants Exercisable	517,257
Weighted Average Remaining Contractual Life	3 years 4 months 28 days
Aggregate Intrinsic value	$ 0
Warrant [Member] | Exercise Price 3.30 [Member]
Exercise price	$ 3.30
Warrants Outstanding	61,207
Warrants Exercisable	61,207
Weighted Average Remaining Contractual Life	1 year 11 months 1 day
Aggregate Intrinsic value	$ 0
Warrant [Member] | Exercise Price 3.75 [Member]
Exercise price	$ 3.75
Warrants Outstanding	50,000
Warrants Exercisable	50,000
Weighted Average Remaining Contractual Life	2 years 7 months 17 days
Aggregate Intrinsic value	$ 0