Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Millions	Sep. 30, 2016	Jun. 30, 2016
BARDA [Member]
Current assets:
Accounts receivable, net of allowance	$ 0.6	$ 0.7
Cash and cash equivalents	45.9	49.7
Short-term investments	12.4	19.3
Prepaid and other current assets	3.9	2.7
Total current assets	62.8	72.4
Non-current assets:
Property and equipment, net	0.3	0.3
Total assets	63.1	72.7
Current liabilities:
Accounts payable	1.6	3.9
Accrued expenses	5.6	3.6
Short-term note payable	0.4	0.4
Liability related to sale of future royalties, current portion	1.2	1.3
Total current liabilities	8.8	9.2
Non-current liabilities:
Long-term note payable, net of current portion	0.3	0.3
Liability related to sale of future royalties, net of current portion	17.2	16.8
Other long-term liabilities, net of current portion	0.2	0.2
Total liabilities	26.5	26.5
Commitments and contingencies
Stockholders’ equity:
Preferred stock, $0.10 par value: 5,000,000 shares authorized, no shares issued and outstanding
Common stock, $0.10 par value: 200,000,000 shares authorized; 38,640,487 shares issued and outstanding at September 30, 2016 and June 30, 2016	3.9	3.9
Additional paid-in capital	158.0	157.6
Accumulated other comprehensive income	19.0	19.0
Accumulated deficit	(144.3)	(134.3)
Total stockholders’ equity	36.6	46.2
Total liabilities and stockholders’ equity	$ 63.1	$ 72.7