SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Cash and Cash Equivalents [Abstract]
Certificates of deposit, Amortized Cost	$ 5,797,322				$ 7,167,818				$ 5,797,322	$ 7,167,818
Certificates of deposit, Unrealized Gains	158				62				158	62
Certificates of deposit, Unrealized (Losses)	(5,112)				(7,919)				(5,112)	(7,919)
Certificates of deposit, Aggregate Fair Market Value	5,792,368				7,159,961				5,792,368	7,159,961
Short-term Investments [Abstract]
Short-term investments, Amortized Cost	234,281,229				52,780,847				234,281,229	52,780,847
Short-term investments, Unrealized Gains	43,051				23,066				43,051	23,066
Short-term investments, Unrealized (Losses)	(30,239)				(9,368)				(30,239)	(9,368)
Short-term investments, Aggregate Fair Market Value	234,294,041				52,794,545				234,294,041	52,794,545
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loss on stock warranty liability									(4,190,283)	(10,077,065)	(1,031,055)
Numerator:
Net income (loss)	5,733,883	5,989,426	3,312,700	(11,880,856)	(5,316,414)	(7,186,570)	(4,436,095)	(2,978,331)	3,155,153	(19,917,410)	(20,505,320)
Denominator:
Weighted average common shares outstanding - Basic (in shares)									43,737,968	37,567,374	36,479,331
Effect of dilutive shares:
Common stock equivalents arising from stock options and ESPP (in shares)									956,803	0	0
Restricted stock awards and units (in shares)									445,623	0	0
Weighted average common shares outstanding - Diluted (in shares)									45,140,394	37,567,374	36,479,331
Net income (loss) per common share:
Basic (in dollars per share)	$ 0.13	$ 0.13	$ 0.07	$ (0.31)					$ 0.07	$ (0.53)	$ (0.56)
Diluted (in dollars per share)	$ 0.12	$ 0.12	$ (0.03)	$ (0.31)					$ 0.07	$ (0.53)	$ (0.56)
Anti-dilutive shares excluded from the calculation of diluted net loss per common share (in shares)									586,972	3,165,048	4,299,598
Deferred revenue [Abstract]
Deferred revenue	9,407,715								9,407,715
Deferred revenue under license agreements not yet executed or deemed effective	3,366,667								3,366,667
Deferred revenue, revenue recognized										2,100,000	1,500,000
Accounts receivable [Abstract]
Unbilled receivables, current	869,982				1,095,329				869,982	1,095,329
Research and Development [Abstract]
Development and operations in the Company's facility									18,658,616	14,959,399	14,350,130
Research and Development Costs incurred under sponsored research agreements									1,021,925	1,143,052	1,264,983
PPG OLED Materials Agreement (Note 7)									3,539,017	3,296,227	3,266,980
Amortization of intangibles									48,849	1,234,272	1,695,072
Scientific Advisory Board compensation									860,826	1,062,189	544,991
Research and Development Expense, Total									24,129,233	21,695,139	21,122,156
Statement of Cash Flow Information [Abstract]
Unrealized gain (loss) on available-for-sale securities									(886)	(11,819)	(100,980)
Common stock issued for royalties that was earned in a previous period [Member]
Other Significant Noncash Transactions [Line Items]
Other non-cash activities									0	81,273	81,954
Common stock issued to Board of Directors and Scientific Advisory Board that was earned in a previous period [Member]
Other Significant Noncash Transactions [Line Items]
Other non-cash activities									299,943	314,181	309,802
Common stock issued to employees that was accrued for in a previous period, net of shares withheld for taxes [Member]
Other Significant Noncash Transactions [Line Items]
Other non-cash activities									1,113,483	929,552	1,031,645
Fair value of stock warrant liability reclassified to shareholders' equity upon exercise [Member]
Other Significant Noncash Transactions [Line Items]
Other non-cash activities									14,850,038	3,137,475	0
Accounting Standards Codification 815 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of the adoption of revisions to ASC 815											(2,689,110)
Accounting Standards Codification 815 [Member] | Additional Paid-in Capital [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of the adoption of revisions to ASC 815											(6,557,928)
Building [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)									30
Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)									15
Office, Lab Equipment and Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life, minimum (in years)									3
Estimated useful life, maximum (in years)									7
Stock warrant [Member]
Derivative [Line Items]
Contractual life (years)										0.6
Contractual life, minimum (years)											0.1
Contractual life, maximum (years)											0.6
Expected volatility (in hundredths)										55.60%
Expected volatility, minimum (in hundredths)											40.50%
Expected volatility, maximum (in hundredths)											76.70%
Risk-free interest rate (in hundredths)										0.20%
Risk-free interest rate, minimum (in hundredths)											0.10%
Risk-free interest rate, maximum (in hundredths)											0.80%
Annual dividend yield (in hundredths)										0.00%	0.00%
Stock warrant liability [Member]
Reconciliation of changes in fair value classified as Level 3 [Roll Forward]
Fair value, beginning of year				10,659,755				3,720,165	10,659,755	3,720,165	0
Cumulative effect of reclassification of stock warrant liability under ASC 815									0	0	2,689,110
Loss for period									4,190,283	10,077,065	1,031,055
Warrants exercised									(14,850,038)	(3,137,475)	0
Fair value, end of year	0				10,659,755				0	10,659,755	3,720,165
Measured on a recurring basis [Member] | Quoted prices in active markets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash equivalents	96,538,248				8,234,698				96,538,248	8,234,698
Short-term investments	234,294,041				52,794,545				234,294,041	52,794,545
Stock warrant liability					0					0
Measured on a recurring basis [Member] | Significant other observable inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash equivalents	0				0				0	0
Short-term investments	0				0				0	0
Stock warrant liability					0					0
Measured on a recurring basis [Member] | Significant unobservable inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash equivalents	0				0				0	0
Short-term investments	0				0				0	0
Stock warrant liability					10,659,755					10,659,755
Total carrying value [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash equivalents	96,538,248				8,234,698				96,538,248	8,234,698
Short-term investments	234,294,041				52,794,545				234,294,041	52,794,545
Stock warrant liability					10,659,755					10,659,755
Corporate bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost	223,260,232				30,423,518				223,260,232	30,423,518
Available-for-sale securities, Gross Unrealized Gains	42,461				19,964				42,461	19,964
Available-for-sale securities, Gross Unrealized (Losses)	(25,118)				(642)				(25,118)	(642)
Available-for-sale securities, Aggregate Fair Market Value	223,277,575				30,442,840				223,277,575	30,442,840
U.S. Government bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost	5,223,675				15,189,511				5,223,675	15,189,511
Available-for-sale securities, Gross Unrealized Gains	432				3,040				432	3,040
Available-for-sale securities, Gross Unrealized (Losses)	(9)				(807)				(9)	(807)
Available-for-sale securities, Aggregate Fair Market Value	$ 5,224,098				$ 15,191,744				$ 5,224,098	$ 15,191,744