Accrued Expenses

3 Months Ended

Mar. 31, 2013

Accrued Expenses [Abstract]

Accrued Expenses

4. Accrued Expenses

	March 31, 2013		December 31, 2012
Payroll and related benefits	$	2,637	$	4,248
Royalties		2,114		1,948
Professional fees		596		413
Other		1,409		1,351
	$	6,756	$	7,960