Consolidated Statements of Changes in Stockholders' Equity (USD $)	Series A Preferred Stock [Member]	Series B Preferred Stock [Member]	Series C Preferred Stock [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Balance at Sep. 03, 2002	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0
Balance (in shares) at Sep. 03, 2002	0	0	0	0
Initial capitalization (founders) - September 10, 2002	0	0	0	949	26,468	0	0	27,417
Initial capitalization (founders) - September 10, 2002 (in shares)	0	0	0	949,035
Subscription - November 1, 2002	0	0	0	61	1,689	0	0	1,750
Subscription - November 1, 2002 (in shares)	0	0	0	60,576
Subscription - October 1, 2003	0	0	0	112	3,138	0	0	3,250
Subscription - October 1, 2003 (in shares)	0	0	0	112,498
Repurchase of founders shares - October 27, 2003	0	0	0	(551)	(15,366)	0	0	(15,917)
Repurchase of founders shares - October 27, 2003 (in shares)	0	0	0	(550,960)
Private placement - from October 27, 2003 through May 5, 2004	0	0	0	392	2,832,088	0	0	2,832,480
Private placement - from October 27, 2003 through May 5, 2004 (in shares)	0	0	0	392,163
Private placement - November 8, 2005	0	0	0	52	374,948	0	0	375,000
Private placement - November 8, 2005 (in shares)	0	0	0	51,922
Private placement - May 8, 2006	0	0	0	2,087	20,497,913	0	0	20,500,000
Private placement - May 8, 2006 (in shares)	0	0	0	2,087,091
Conversion of promissory notes - May 8, 2006	0	0	0	161	1,341,088	0	0	1,341,249
Conversion of promissory notes - May 8, 2006 (in shares)	0	0	0	160,637
Commissions, legal, and other costs for private placement	0	0	0	0	(1,500,138)	0	0	(1,500,138)
Stock-based compensation:
Directors and employees	0	0	0	0	604,372	0	0	604,372
Consultants	0	0	0	0	494,685	0	0	494,685
Exercise of stock options	0	0	0	6	17,699	0	0	17,705
Exercise of stock options (in shares)	0	0	0	6,129
Exercise of warrants	0	0	0	52	374,948	0	0	375,000
Exercise of warrants (in shares)	0	0	0	51,922
Other comprehensive Income (loss)	0	0	0	0	0	0	84,978	84,978
Net loss	0	0	0	0	0	(18,656,010)	0	(18,656,010)
Balance at Dec. 31, 2007	0	0	0	3,321	25,053,532	(18,656,010)	84,978	6,485,821
Balance (in shares) at Dec. 31, 2007	0	0	0	3,321,013
Private placement May 23, 2008	13,889	0	0	0	24,986,111	0	0	25,000,000
Private placement May 23, 2008 (in shares)	13,888,889
Commissions, legal, and other costs for private placement	0	0	0	0	(749,075)	0	0	(749,075)
Stock-based compensation:
Directors and employees	0	0	0	0	682,025	0	0	682,025
Consultants	0	0	0	0	127,359	0	0	127,359
Other comprehensive Income (loss)	0	0	0	0	0	0	(155,784)	(155,784)
Net loss	0	0	0	0	0	(13,704,870)	0	(13,704,870)
Balance at Dec. 31, 2008	13,889	0	0	3,321	50,099,952	(32,360,880)	(70,806)	17,685,476
Balance (in shares) at Dec. 31, 2008	13,888,889	0	0	3,321,013
Stock-based compensation:
Directors and employees	0	0	0	0	908,375	0	0	908,375
Consultants	0	0	0	0	53,425	0	0	53,425
Exercise of stock options	0	0	0	9	24,991	0	0	25,000
Exercise of stock options (in shares)	0	0	0	8,653
Cumulative effect of accounting adjustment	0	0	0	0	(2,187,680)	0	0	(2,187,680)
Other comprehensive Income (loss)	0	0	0	0	0	0	(7,314)	(7,314)
Net loss	0	0	0	0	0	(14,354,522)	0	(14,354,522)
Balance at Dec. 31, 2009	13,889	0	0	3,330	48,899,063	(46,715,402)	(78,120)	2,122,760
Balance (in shares) at Dec. 31, 2009	13,888,889	0	0	3,329,666
Commissions, legal, and other costs for private placement	0	0	0	0	(111,704)	0	0	(111,704)
Stock-based compensation:
Directors and employees	0	0	0	0	1,604,117	0	0	1,604,117
Consultants	0	0	0	0	88,768	0	0	88,768
Private placement January 20, 2010	0	13,889	0	0	19,787,894	0	0	19,801,783
Private placement January 20, 2010 (in shares)	0	13,888,889	0	0
Other comprehensive Income (loss)	0	0	0	0	0	0	(100,035)	(100,035)
Net loss	0	0	0	0	0	(15,087,223)	0	(15,087,223)
Balance at Dec. 31, 2010	13,889	13,889	0	3,330	70,268,138	(61,802,625)	(178,155)	8,318,466
Balance (in shares) at Dec. 31, 2010	13,888,889	13,888,889	0	3,329,666
Stock-based compensation:
Directors and employees	0	0	0	0	1,779,785	0	0	1,779,785
Consultants	0	0	0	0	85,970	0	0	85,970
Other comprehensive Income (loss)	0	0	0	0	0	0	(6,345)	(6,345)
Net loss	0	0	0	0	0	(12,737,654)	0	(12,737,654)
Balance at Dec. 31, 2011	13,889	13,889	0	3,330	72,133,893	(74,540,279)	(184,500)	(2,559,778)
Balance (in shares) at Dec. 31, 2011	13,888,889	13,888,889	0	3,329,666
Stock-based compensation:
Directors and employees	0	0	0	0	2,436,430	0	0	2,436,430
Consultants	0	0	0	0	912,559	0	0	912,559
Private placement - August 9, 2012	0	0	15,000	0	29,715,000	0	0	29,730,000
Private placement - August 9, 2012 (in shares)	0	0	15,000,000	0
Preferred shares converted to common stock	(13,889)	(13,889)	(15,000)	7,404	35,374	0	0	0
Preferred shares converted to common stock (in shares)	(13,888,889)	(13,888,889)	(15,000,000)	7,403,817
Issuance of common stock from initial public offering, net of underwriting fees and issuance costs	0	0	0	5,750	78,764,246	0	0	78,769,996
Issuance of common stock from initial public offering, net of underwriting fees and issuance costs (in shares)	0	0	0	5,750,000
Warrants converted to common stock	0	0	0	43	1,018,172	0	0	1,018,215
Warrants converted to common stock (in shares)	0	0	0	43,402
Reclassification of warrants from equity to liabilities	0	0	0	0	(915,535)	0	0	(915,535)
Other comprehensive Income (loss)	0	0	0	0	0	0	163,049	163,049
Net loss	0	0	0	0	0	(43,643,071)	0	(43,643,071)
Balance at Dec. 31, 2012	$ 0	$ 0	$ 0	$ 16,527	$ 184,100,139	$ (118,183,350)	$ (21,451)	$ 65,911,865
Balance (in shares) at Dec. 31, 2012	0	0	0	16,526,885