Transactions with Affiliates (Details) - Affiliated Entities [Member] - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Related Party Transaction [Line Items]
Overhead recoveries	$ 97,000	$ 151,000	$ 152,000
Affiliate billings to company	68,000	65,000	69,000
Company billings to affiliate	35,000	42,000	99,000
Rentals paid to affiliate	$ 618,000	607,000	$ 481,000
Total study costs incurred		$ 70,420