Actavis Transactions (Details) (USD $)	1 Months Ended	12 Months Ended			0 Months Ended		12 Months Ended		36 Months Ended	12 Months Ended			0 Months Ended
	Apr. 20, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Jul. 02, 2010 Collaborative arrangement [Member]	Mar. 03, 2010 Collaborative arrangement [Member]	Dec. 31, 2012 Collaborative arrangement [Member]	Dec. 31, 2010 Collaborative arrangement [Member]	Dec. 31, 2012 Collaborative arrangement [Member]	Dec. 31, 2012 Beneficial owner [Member]	Dec. 31, 2011 Beneficial owner [Member]	Dec. 31, 2010 Beneficial owner [Member]	Jul. 02, 2010 Minimum [Member] Collaborative arrangement [Member]	Jul. 02, 2010 Maximum [Member] Collaborative arrangement [Member]	Jun. 01, 2010 Term loan promissory note [Member]	Jul. 02, 2010 Actavis [Member] Collaborative arrangement [Member]
Related Party Transaction [Line Items]
Stock issued during period, shares, issued for noncash consideration						11,200,000
Face amount of debt															$ 15,000,000
Notes payable interest accrual rate															4.00%
Prepayment fee															2,000,000
Proceeds from sale of assets	3,100,000	0	0	15,000,000	47,000,000
Potential cash payment amount					45,500,000
Amount of milestone payment					5,000,000											5,000,000
Nonpayable Milestone Payment, Amount													6,000,000	8,000,000
General and administrative		8,570,094	8,108,194	14,716,339				4,200,000
Royalty revenue percentage													0.10	0.20
Conditional Royalty Reduction Percentage					50.00%		1.00%
Gross Profit Entitlement In Lieu of Third Party Commercialization					20.00%
Research and Development Arrangement Contract to Perform for Others, Amount														7,000,000
Research and Development Expense		770,642	2,779,058	8,581,874					10,600,000
Reimbursement Revenue										435,199	3,196,601	0
Amount Of Cap Exceeded On Agreed Research And Developent Costs									3,600,000
Product Sales Price Based On Cost of Good Sold					110.00%
Shares issued in connection with the elimination of intangible assets					11,800,000
Assets of Disposal group, including discontinued operation					16,200,000
Extinguishment of debt, amount					15,000,000
Deferred revenue, revenue recognized		0	0	265,168
Royalties							10,000,000
Reimbursement Payment, Acquisiiton Operating Expenses								$ 1,100,000