Stock-based expense and assumptions

3 Months Ended

Mar. 31, 2013

Stock-based expense and assumptions

Stock-based expense and assumptions

6. Stock-based expense and assumptions

Stock-based expense is measured at the grant date based on fair value and recognized as an expense over the requisite service period, net of an estimated forfeiture rate.

The following summarizes stock-based expense recognized by income statement classification:

	Three months ended March 31,
	2013		2012
Processing and service costs	$	49,643	$	80,781
Selling, general and administrative expenses	209,286		143,611
Total stock-based expense	$	258,929	$	224,392