Condensed Consolidated Statements of Stockholders' Equity (Deficit) and Redeemable Instruments (Unaudited) (USD $) In Thousands, except Share data	Total	Common Stock [Member]	Additional Paid In Capital [Member]	Accumulated Deficit [Member]	Redeemable Preferred Stock [Member]	Redeemable Common Stock [Member]
BALANCE at Dec. 31, 2012	$ (7,482)	$ 162	$ 3,959	$ (11,603)	$ 49,615	$ 17,246
BALANCE, Preferred stock at Dec. 31, 2012					1,000
BALANCE, Shares at Dec. 31, 2012		16,183,901				5,850,000
Net income	3,663			3,663
Accretion of Redeemable Preferred Stock to Redemption Value	(4,597)		(3,959)	(638)	4,597
Adjustments to Redeemable Common Stock fair value measurement	(33,108)			(33,108)		33,108
BALANCE at Sep. 30, 2013	(41,524)	162		(41,686)	54,212	50,354
BALANCE, Preferred stock at Sep. 30, 2013					1,000
BALANCE, Shares at Sep. 30, 2013		16,183,901				5,850,000
BALANCE at Dec. 31, 2013	(71,429)	162		(71,591)	55,838	81,010
BALANCE, Preferred stock at Dec. 31, 2013	0				1,000
BALANCE, Shares at Dec. 31, 2013	16,183,901	16,183,901				5,850,000
Net income	8,876			8,876
Initial Public Offering (IPO), Value	78,949	86	78,863
Initial Public Offering (IPO), Shares		8,567,500
Secondary Public Offering, Value	14,292	12	14,280
Secondary Public Offering, Shares		1,214,196
Redemption of Redeemable Preferred Stock, Value					(75,735)
Redemption of Redeemable Preferred Stock, Shares					(1,000)
Termination of Redemption Feature upon IPO, value	89,367	58	89,309			(89,367)
Termination of Redemption Feature upon IPO, shares		5,850,000				(5,850,000)
Accretion of Redeemable Preferred Stock to Redemption Value	(19,897)		(19,897)		19,897
Adjustments to Redeemable Common Stock fair value measurement	(8,357)		(8,357)			8,357
Share-Based Compensation issued to Directors, Value	300	1	299
Share-Based Compensation issued to Directors, Shares		23,490
BALANCE at Sep. 30, 2014	$ 92,101	$ 319	$ 154,497	$ (62,715)
BALANCE, Preferred stock at Sep. 30, 2014	0				0
BALANCE, Shares at Sep. 30, 2014	31,839,087	31,839,087				0