RELATED PARTY TRANSACTIONS (Details) (USD $)	6 Months Ended	1 Months Ended		37 Months Ended	6 Months Ended																							6 Months Ended		12 Months Ended	6 Months Ended
	Jun. 30, 2013	Oct. 31, 2010 Chief Executive Officer and Chief Scientific Officer [Member]	Jan. 31, 2010 Chief Executive Officer and Chief Scientific Officer [Member]	Mar. 31, 2013 Chief Executive Officer and Chief Scientific Officer [Member]	Jun. 30, 2013 Chief Executive Officer and Chief Scientific Officer [Member] Stock Option One [Member] Unit		Jun. 30, 2013 Chief Executive Officer and Chief Scientific Officer [Member] Stock Option Two [Member] Unit		Jun. 30, 2013 Chief Executive Officer and Chief Scientific Officer [Member] Stock Option Two [Member] Minimum [Member]	Jun. 30, 2013 Chief Executive Officer and Chief Scientific Officer [Member] Stock Option Two [Member] Maximum [Member]	Jun. 30, 2013 Employees and Officers [Member] Stock Option One [Member] Unit		Jun. 30, 2013 Employees and Officers [Member] Stock Option Two [Member] Unit		Jun. 30, 2013 Employees [Member] Stock Option One [Member]		Jun. 30, 2013 Employees [Member] Stock Option One [Member] Minimum [Member] Unit	Jun. 30, 2013 Employees [Member] Stock Option One [Member] Maximum [Member] Unit	Jun. 30, 2013 Employees [Member] Stock Option Two [Member] Unit		Jun. 30, 2013 Employees [Member] Stock Option Three [Member] Unit		Jun. 30, 2013 Employees [Member] Stock Option Four [Member] Unit		Jun. 30, 2013 Non Employee Director [Member] Stock Option One [Member] Unit		Feb. 29, 2012 Non Employee Director [Member] Stock Option One [Member]	Jun. 30, 2013 Non Employee Director [Member] Stock Option Two [Member] Unit		Dec. 31, 2011 Dr.Hunkapiller [Member]	Jun. 30, 2013 Dr.Hunkapiller [Member] Stock Option One [Member] Unit
Date of grant	Sep. 01, 2011				Jul. 22, 2010		Mar. 11, 2013				Sep. 01, 2011		Jan. 04, 2013		Dec. 17, 2012				Dec. 20, 2012		Jan. 03, 2013		Jan. 05, 2013		Sep. 01, 2011			Apr. 30, 2012			Apr. 04, 2011
Fair value of common stock on date of grant		$ 2.756	$ 2.756	$ 3.00	$ 2.7560	[1]	$ 6.57	[2]			$ 0.9060	[3]	$ 4.11	[2]	$ 4.24	[2]			$ 4.11	[2]	$ 4.31	[2]	$ 3.95	[2]	$ 0.9060	[3]		$ 6.00	[4]	$ 0.906	$ 0.9060
Exercise price of the options					$ 5.00		$ 6.57			$ 7.00	$ 1.25		$ 4.11		$ 4.24				$ 4.11		$ 4.31		$ 3.95		$ 1.25		$ 6.00	$ 6.00			$ 1.25
Expected life of the options (years)					3 years 3 months 29 days		5 years				5 years 7 months 24 days		6 years 1 month 10 days				5 years 8 months 26 days	6 years 1 month 6 days	6 years 1 month 10 days		6 years 1 month 10 days		6 years 1 month 10 days		5 years 7 months 24 days			5 years			5 years 3 months 22 days
Dividend yield					0.00%		0.00%				0.00%		0.00%		0.00%				0.00%		0.00%		0.00%		0.00%			0.00%			0.00%
Expected volatility					58.59%		47.09%				53.90%		43.79%				42.44%	44.58%	42.44%		42.23%		42.22%		53.90%			62.46%			54.12%
Risk-free interest rate					1.03%				0.90%	1.13%	1.08%		0.99%				0.91%	0.99%	0.99%		0.99%		1.13%		1.08%			0.89%			2.26%
Expected forfeiture per year (%)					0.00%		0.00%						10.00%				0.00%	10.00%	0.00%		10.00%		10.00%		0.00%			0.00%			0.00%	[5]
Weighted-average fair value of the options (per unit)					0.6744		2.7022				0.3579		1.6922				1.7426	1.7887	1.7842		1.4712		1.3511		0.3579			3.0367			0.3729

[1] The fair value of the Company's common stock was derived implicitly from the public offering filed in March 2010 at $3.00 per share and from the terms of an underwritten offering contemplated in July 2010 at $6.00 per Unit that was filed in October 2010, with $2.756 per share being allocated to common stock using an iterative approach in order for the combined fair value of the common stock and warrants to equal the amount of consideration to be received for the offering.

[2] The fair values of the Company's common stock were derived from the closing prices on the NASDAQ Capital Market as of the dates of grant.

[3] The fair value of the Company's common stock was derived implicitly from the Private Placement during April through June 2011 at $1.25 per Unit, wherein one Unit was comprised of one share of common stock and one warrant to purchase one share of common stock at an exercise price of $1.60 per share.

[4] The fair value of the Company's common stock was derived implicitly from the public offering filed in February 2012 at $6.00 per share.

[5] 0.00% for the first year after the grant date, and 96.35% for every three months thereafter.