Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2015

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

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

The interest rates used are the U.S. Treasury yield curve in effect at the time of the grant.

	For the six months ended
	June 30, 2015
Expected volatility		52.7% - 63.8%
Expected term (in years)		3.2 -3.3 years
Risk-free rate		0.89%-1.20%
Expected dividends		0%

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

A summary of option activity under the 1999 Plan, the Director Plan and the 2009 Plan as of June 30, 2015 and changes during the period are presented below:

			Weighted
	Number of		Average
	Options		Exercise Price
Outstanding as of January 1, 2015		2,436,834	$	1.79
Issued		640,000	$	9.89
Exercised		(10,166)	$	1.83
Forfeited		(18,500)	$	5.10
Expired		-		-
Outstanding as of June 30, 2015		3,048,168	$	3.47
Exercisable as of June 30, 2015		1,820,666	$	1.21

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]

The following table summarizes information regarding options outstanding and exercisable at June 30, 2015:

Outstanding:
					Weighted
	Stock		Weighted		Average
	Options		Average		Remaining
Range of Exercise Prices	Outstanding		Exercise Price		Contractual Life
$0.76 - $1.00		95,000	$	0.78		2.59
$1.01 - $1.50		1,881,000	$	1.07		6.65
$1.51 - $10.67		1,072,168	$	7.92		9.04
Total		3,048,168	$	3.47		7.36

Exercisable:
	Stock		Weighted
	Options		Average
Range of Exercise Prices	Exercisable		Exercise Price
$0.76 - $1.00		95,000	$	0.78
$1.01 - $1.50		1,523,166	$	1.08
$1.51 - $10.67		202,500	$	2.37
Total		1,820,666	$	1.21

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

At June 30, 2015, the Company had approximately $1.1 million of total unrecognized compensation cost related to non-vested restricted stock and RSUs, all of which will be recognized through February 2018.

	Number of		Weighted Average
	Restricted Stock		Exercise Price
Non-vested balance at January 1, 2015		108,334	$	2.86
Changes during the period:
Shares granted		32,500		10.67
Shares vested		(32,500)		10.67
Shares forfeited		-		-
Non-vested balance at June 30, 2015		108,334	$	2.86

	Number of		Weighted Average
	RSUs		Exercise Price
Non-vested balance at January 1, 2015		-	$	-
Changes during the period:
Shares granted		145,250		10.67
Shares vested		(32,500)		10.67
Shares forfeited		-		-
Non-vested balance at June 30, 2015		112,750	$	10.67