Accounts Payable and Accrued Expenses (Tables)

6 Months Ended

Jun. 30, 2012

Accounts Payable and Accrued Expenses [Abstract]

Schedule of accounts payable and accrued expenses

	December 31, 2011		June 30, 2012
Accounts payable	$	910	$	1,543
Payable to benefit providers and transit agencies		6,491		17,121
Accrued payables		5,843		5,288
Accrued compensation and related benefits		6,926		7,651
Other accrued expenses		792		1,726
Deferred revenue		453		2,042
Accounts payable and accrued expenses	$	21,415	$	35,371