Note 1 - Summary of Receivables (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
US Department of Health and Human Services [Member] | Billed Revenues [Member]
Receivables
US Department of Health and Human Services [Member] | Unbilled Revenues [Member]
Receivables	$ 5,536	$ 2,778
US Department of Health and Human Services [Member]
Receivables	5,536	2,778
Shionogi and Co. Ltd [Member] | Billed Revenues [Member]
Receivables	$ 469	$ 1,071
Shionogi and Co. Ltd [Member] | Unbilled Revenues [Member]
Receivables
Shionogi and Co. Ltd [Member]
Receivables	$ 469	$ 1,071
CSL Limited [Member | Billed Revenues [Member]
Receivables	210
CSL Limited [Member | Unbilled Revenues [Member]
Receivables	28
CSL Limited [Member
Receivables	238
Billed Revenues [Member]
Receivables	679	1,071
Unbilled Revenues [Member]
Receivables	5,564	2,778
Receivables	$ 6,243	$ 3,849