Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2016	Jun. 30, 2015
BARDA [Member]
Current liabilities:
Contract payable (BARDA)		$ 1.0
Cash and cash equivalents	49.7	44.7
Other accounts receivable, net of allowance	0.7	12.6
Short-term investments	19.3	12.9
Prepaid expenses and other assets	2.7	0.6
Total current assets	72.4	70.8
Long-term investments		7.9
Property and equipment, net	0.3	0.2
Deferred tax asset		0.5
Total non-current assets	0.3	8.6
Total assets	72.7	79.4
Accounts payable	3.9	1.9
Accrued expenses and other current liabilities	3.6	5.4
Contract payable (BARDA)	7.5	8.3
Short-term note payable	0.4	0.2
Liability related to sale of future royalties, current portion	1.3
Deferred tax liability		0.5
Total current liabilities	9.2	9.0
Long-term note payable, net of current portion	0.3	0.8
Liability related to sale of future royalties, net of current portion	16.8
Other long-term liabilities, net of current portion	0.2	0.1
Total liabilities	26.5	9.9
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 and 38,609,086 shares issued and outstanding at June 30, 2016 and June 30, 2015, respectively	3.9	3.9
Additional paid-in capital	157.6	155.6
Accumulated other comprehensive income	19.0	18.9
Accumulated deficit	(134.3)	(108.9)
Total stockholders’ equity	46.2	69.5
Total liabilities and stockholders’ equity	$ 72.7	$ 79.4