Commitments and Contingencies (Detail) (USD $)	12 Months Ended		0 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Oct. 18, 2011 AUS Against Benz Air [Member]	Jul. 29, 2011 AUS Against Benz Air [Member]	Jan. 16, 2009 AUS Against Benz Air [Member]	Nov. 17, 2008 AUS Against Benz Air [Member]	Jul. 31, 2012 Global Settlement Agreement [Member]
Operating Leases, Rent Expense	$ 1,500,000
Loss Contingency, Damages Sought, Value					200,000	300,000
Loss Contingency, Damages Awarded, Value				200,000
Loss Contingency Damages Awarded Additional Value				300,000
Loss Contingency Damages Awarded Overturned Value			300,000
Loss Contingency Damages Awarded Attorneys fees Value			500,000
Gain (Loss) Related to Litigation Settlement	300,000	200,000	200,000
Loss Contingency, Settlement Agreement, Consideration							175,000
Loss Contingency Settlement Agreement Individual Consideration							25,000
Sales and Excise Tax Payable	$ 1,300,000