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Revenue Recognition (Details)	3 Months Ended		12 Months Ended
	Mar. 31, 2016 USD ($) Distributor Customer	Mar. 31, 2015 USD ($) Distributor	Dec. 31, 2015 Customer
Concentration Risk [Table]
Revenues	$ 1,333,000	$ 902,000
Concentration risk percentage	100.00%	100.00%
Customer Concentration Risk [Member] | Revenue Recognized [Member]
Concentration Risk [Table]
Number of distributors | Distributor	1	3
Number of customers | Customer	1
Concentration risk percentage	68.00%	68.00%
Customer Concentration Risk [Member] | Accounts Receivable [Member]
Concentration Risk [Table]
Number of distributors | Distributor	1
Number of customers | Customer	2		2
Concentration risk percentage	68.00%		73.00%
BARDA Contract [Member]
Research and Development Arrangements [Line Items]
Revenue recognized	$ 1,600,000	$ 1,400,000
Americas [Member]
Concentration Risk [Table]
Revenues	$ 235,000	$ 201,000
Concentration risk percentage	18.00%	22.00%
Japan [Member]
Concentration Risk [Table]
Revenues	$ 966,000	$ 605,000
Concentration risk percentage	72.00%	67.00%
EMEA [Member]
Concentration Risk [Table]
Revenues	$ 132,000	$ 92,000
Concentration risk percentage	10.00%	10.00%
Asia Pacific [Member]
Concentration Risk [Table]
Revenues	$ 0	$ 4,000
Concentration risk percentage	0.00%	1.00%

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Represents the number of customers included in each grouping.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=51801978&loc=d3e6351-108592

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13531-108611

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 605
-SubTopic 10
-Section S99
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-URI http://asc.fasb.org/extlink&oid=27012821&loc=d3e214044-122780

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
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