Collaborative Arrangements (Details) (USD $)	3 Months Ended	0 Months Ended	3 Months Ended	6 Months Ended		3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2013	Feb. 01, 2012 Merck [Member]	Jun. 30, 2014 Merck [Member]	Jun. 30, 2014 Merck [Member]	Jun. 30, 2013 Merck [Member]	Jun. 30, 2014 Arch [Member]	Jun. 30, 2013 Arch [Member]	Jun. 30, 2014 Arch [Member]	Jun. 30, 2013 Arch [Member]	Dec. 31, 2013 Arch [Member]
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Term of collaborative research and development agreement (years)		5 years
Deferred Revenue			$ 2,500,000	$ 2,500,000
License and Services Revenue	500,000		500,000	1,000,000	800,000
Sales Revenue, Goods, Net						200,000	0	200,000	2,100,000
Allowance for Doubtful Accounts Receivable, Charge-offs										$ 387,000