Legal Proceedings (Details Textual) (USD $)	3 Months Ended				3 Months Ended		3 Months Ended
	Dec. 31, 2012 Customer Bankruptcy [Member]	Sep. 30, 2012 Customer Bankruptcy [Member]	Mar. 31, 2012 Customer Bankruptcy [Member]	Jan. 31, 2011 Customer Bankruptcy [Member]	Mar. 31, 2011 SEC Penalties Settlement [Member]	Jan. 31, 2011 SEC Penalties Settlement [Member]	Mar. 31, 2012 Doj Penalties Settlement [Member]	Mar. 31, 2011 Doj Penalties Settlement [Member]	Mar. 31, 2013 Doj Penalties Settlement [Member]	Jan. 31, 2011 Doj Penalties Settlement [Member]
Loss Contingencies [Line Items]
Legal agree upon settle amount	$ 525,000					$ 6,400,000			$ 2,300,000	$ 8,000,000
Payments for legal settlements					3,200,000		2,300,000	3,500,000
Bankruptcy proceedings settlement offer			750,000	250,000
Accrued estimated loss on settlement offer		750,000
Decrease in settleent accrual under customer bankruptcy claim	$ 225,000