Accounts Receivable and Revenue Concentrations

6 Months Ended

Jun. 30, 2011

Accounts receivable and revenue concentrations [Abstract]

Accounts receivable and revenue concentrations

2.	Accounts receivable and revenue concentrations
	Three customers accounted for 26%, 29% and 33%, respectively, of gross accounts receivable as of June 30, 2011. Two customers accounted for 60% and 13%, respectively, of gross accounts receivable as of June 30, 2010.
	Three customers accounted for 11%, 13%, and 23%, respectively, of total revenue for the three months ended June 30, 2011. Two customers accounted for 33% of total revenue for the three months ended June 30, 2010.
	Two customers accounted for 10% and 11%, respectively, and another two customers each accounted for 12%, of total revenue for the six months ended June 30, 2011. One customer, accounted for 25% of total revenue for the six months ended June 30, 2010.