Related Party Transactions (Details) - USD ($)		12 Months Ended
	Nov. 14, 2008	Dec. 31, 2016	Dec. 31, 2015
Related Party Transaction [Line Items]
Current equity investment		$ 9,000,000
Future equity quarterly investments		500,000
Capital account balance		0
Aggregate payments		2,000,000	$ 1,900,000
Total license revenue that we were entitled to receive		184,000
License revenue		$ 46,000	$ 176,000
Common Class B [Member]
Related Party Transaction [Line Items]
Number Of Shares Issued By The Subsidiary For The Related Party Transaction	20