Equity based compensation (Tables)

9 Months Ended

Sep. 30, 2013

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of expenses related to share-based payments

The following table highlights the expense related to share-based payments for the three months and nine months ended September 30, 2013 and 2012:

	Three months ended September 30,				Nine months ended September 30,
	2013		2012		2013		2012
Nonvested stock	$	171	$	334	$	307	$	442
Stock options	129		55		257		285
Restricted stock units	9		—		9		—
Stock purchases	—		—		—		342
Stock based compensation	$	309	$	389	$	573	$	1,069

Schedule of nonvested stock awards and stock option awards

The following is a summary of nonvested stock, restricted stock unit and stock option awards:

	Nonvested Stock				Restricted Stock Units			Stock Options
	Number of shares outstanding		Weighted average grant date fair value		Number of units outstanding	Weighted average grant date fair value		Number of options outstanding		Weighted average exercise price
December 31, 2012	396,073		$	1.06	—	$	—	772,851		$	0.97
Granted	589,102		16.78		10,000	13.96		463,106		14.00
Vested/exercised	(366,856	)	0.93		—	—		(546,244	)	0.97
September 30, 2013	618,319		$	16.11	10,000	$	13.96	689,713		$	9.72