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Note F - Reserved Authorized Shares of Common Stock for Future Issuance (Details) - shares	Jun. 30, 2016	Dec. 31, 2015
Convertible Notes Payable [Member]
Common shares reserved for future issuance (in shares)	2,088,931	1,991,219
2021 Notes [Member]
Common shares reserved for future issuance (in shares)	5,040,914
Stock Compensation Plan [Member]
Common shares reserved for future issuance (in shares)	2,238,153	1,397,511
Possible Future Issuances Under Equity Incentive Plans [Member]
Common shares reserved for future issuance (in shares)	1,130,111	1,410,848
Warrant [Member]
Common shares reserved for future issuance (in shares)	2,087,477	2,325,383
Common shares reserved for future issuance (in shares)	12,585,586	7,124,961

X

- Definition

Aggregate number of common shares reserved for future issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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