Consolidated Statements of Changes in Stockholders's Equity (USD $)	Total USD ($)	Period One [Member] USD ($)	Initial Public Offering And Private Placement [Member] USD ($)	Common Stock [Member] USD ($)	Common Stock [Member] Period One [Member]	Common Stock [Member] Initial Public Offering And Private Placement [Member] USD ($)	Additional Paid-In Capital [Member] USD ($)	Additional Paid-In Capital [Member] Period One [Member] USD ($)	Additional Paid-In Capital [Member] Initial Public Offering And Private Placement [Member] USD ($)	Retained Earnings (Deficit) [Member] USD ($)	Accumulated Other Comprehensive Income [Member] USD ($)
Beginning Balance at Aug. 06, 2012
Issuance of equity	$ 23,290,000			$ 1,000			$ 23,289,000
Issuance of equity, Shares				5,938,950
Equity based compensation	5,320,000						5,320,000
Equity based compensation, Shares				1,356,600
Notes payable exchanged for equity	4,975,000						4,975,000
Notes payable exchanged for equity, Shares				1,014,900
Net Income	(5,466,000)									(5,466,000)
Ending balance at Dec. 31, 2012	28,119,000			1,000			33,584,000			(5,466,000)
Ending balance, Shares at Dec. 31, 2012				8,310,450
Equity reclassified to temporary equity	4,150,000						4,150,000
Equity reclassified to temporary equity, Shares	1,058,250			1,058,250
Issuance of 6,691,200 warrants and 313,650 redeemable shares	31,939,000						31,939,000
Issuance of warrants and redeemable shares, Shares				6,459,150
Equity based compensation	1,273,000						1,273,000
Equity based compensation, Shares				247,350
Executive stock grant	150,000						150,000
Executive stock grant, Share				38,250
Issuance of common stock to underwriters for over allotment, net of discount fee and direct costs of issuance of $700	53,000						53,000
Issuance of common stock to underwriters for over allotment, net of discount fee and direct costs of issuance, Shares				10,200
Net unrealized change in investments, net of tax	(790,000)										(790,000)
Change in fair value of redeemable shares	(10,823,000)									(10,823,000)
Exercise of warrants	7,650
Exercise of warrants, Shares	45,000
Net Income	34,213,000									34,213,000
Ending balance at Dec. 31, 2013	79,984,000			1,000			62,849,000			17,924,000	(790,000)
Ending balance, Shares at Dec. 31, 2013				14,007,150
Equity reclassified to temporary equity	20,921,000						20,921,000
Equity reclassified to temporary equity, Shares	2,338,350			2,338,350
Issuance of equity		88,000	69,470,000			1,000		88,000	69,469,000
Issuance of equity, Shares					17,850	6,909,091
Issuance of common stock to underwriters for over allotment, net of discount fee and direct costs of issuance of $700	9,200,000						9,200,000
Issuance of common stock to underwriters for over allotment, net of discount fee and direct costs of issuance, Shares				900,000
Net unrealized change in investments, net of tax	2,513,000										2,513,000
Exercise of warrants	22,515,000			1,000			22,514,000
Exercise of warrants, Shares				5,622,519
Stock based compensation	3,301,000						3,301,000
Net Income	47,097,000									47,097,000
Ending balance at Dec. 31, 2014	$ 255,089,000			$ 3,000			$ 188,342,000			$ 65,021,000	$ 1,723,000
Ending balance, Shares at Dec. 31, 2014				29,794,960