Stock-based expense and assumptions (Tables)

6 Months Ended

Jun. 30, 2013

Stock-based expense

Summary of stock-based expense recognized by income statement classification

	Three months ended June 30,				Six months ended June 30,
	2013		2012		2013		2012
Processing and service costs	$	58,162	$	48,220	$	107,805	$	129,001
Selling, general and administrative expenses	231,865		267,785		441,151		411,396
Total stock-based expense	$	290,027	$	316,005	$	548,956	$	540,397

Summary of stock-based expense recognized by stock based compensation program

	Three months ended June 30,				Six months ended June 30,
	2013		2012		2013		2012
Stock options	$	252,640	$	316,005	$	511,569	$	540,397
Restricted stock awards	37,387		—		37,387		—
Total stock-based expense	$	290,027	$	316,005	$	548,956	$	540,397