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Warrants and Derivative Liabilities (Tables)

12 Months Ended

Mar. 31, 2016

Senior Convertible Note Warrant

Class Of Warrant Or Right [Line Items]

Schedule of Assumptions Used to Calculate the Fair Value of Warrants

Following is a summary of the key assumptions used to calculate the fair value of the Exchanged Warrant:

	March 31,				December 31,				September 30,				June 30,
Fiscal Year 15	2016				2015				2015				2015
Risk-free interest rate		0.66	%			0.96	%			0.64	%			0.74	%
Expected annual dividend yield		—	%			—	%			—	%			—	%
Expected volatility		76.76	%			76.68	%			73.39	%			71.61	%
Term  (years)	1.51				1.76				2.01				2.26
Fair value	$0.4 million				$0.3 million				$0.1 million				$0.2 million
	March 31,				December 31,				September 30,				June 30,
Fiscal Year 14	2015				2014				2014				2014
Risk-free interest rate		0.73	%			1.00	%			1.07	%			0.98	%
Expected annual dividend yield		—	%			—	%			—	%			—	%
Expected volatility		70.42	%			72.38	%			76.20	%			83.50	%
Term  (years)	2.51				2.76				3.01				3.26
Fair value	$0.3 million				$0.5 million				$1.5 million				$2.3 million
									Post-modification				Pre-modification
	March 31,				December 31,				October 9,				October 9,				September 30,				June 30,				March 31,
Fiscal Year 13	2014				2013				2013				2013				2013				2013				2013
Risk-free interest rate		1.11	%			1.17	%			1.05	%			1.05	%			1.02	%			1.13	%			0.67	%
Expected annual dividend yield		—	%			—	%			—	%			—	%			—	%			—	%			—	%
Expected volatility		80.99	%			75.60	%			71.45	%			71.45	%			71.98	%			71.90	%			71.74	%
Term  (years)	3.51				3.76				3.99				3.99					4.01				4.27				4.51
Fair value	$ 2.2 million				$ 2.2 million				$ 3.2 million				$ 2.2 million				$ 2.5 million				$ 3.0 million				$ 3.4 million

Hercules Warrant

Class Of Warrant Or Right [Line Items]

Schedule of Assumptions Used to Calculate the Fair Value of Warrants

Following is a summary of the key assumptions used to calculate the fair value of the Hercules Warrant:

	March 31,				December 31,				September 30,				June 30,
Fiscal Year 15	2016				2015				2015				2015
Risk-free interest rate		1.08	%			1.65	%			1.31	%			1.63	%
Expected annual dividend yield		—	%			—	%			—	%			—	%
Expected volatility		70.25	%			73.57	%			75.32	%			72.57	%
Term  (years)		4.25				4.50				4.75				5.00
Fair value	$0.2 million				$0.2 million				$0.1 million				$0.2 million
									New Issuance
	March 31,				December 31,				December 19,
Fiscal Year 14	2015				2014				2014
Risk-free interest rate		1.41	%			1.73	%			1.74	%
Expected annual dividend yield		—	%			—	%			—	%
Expected volatility		74.60	%			77.43	%			70.26	%
Term  (years)		5.25				5.50				5.53
Fair value	$0.2 million				$0.2 million				$0.2 million

November 2014 Warrant

Class Of Warrant Or Right [Line Items]

Schedule of Assumptions Used to Calculate the Fair Value of Warrants

Following is a summary of the key assumptions used to calculate the fair value of the November 2014 Warrant:

	March 31,				December 31,				September 30,				June 30,
Fiscal Year 15	2016				2015				2015				2015
Risk-free interest rate		0.98	%			1.51	%			1.17	%			1.44	%
Expected annual dividend yield		—	%			—	%			—	%			—	%
Expected volatility		69.88	%			70.02	%			73.02	%			74.18	%
Term  (years)		3.62				3.87				4.12				4.37
Fair value	$2.6 million				$2.1 million				$1.3 million				$1.8 million
									New Issuance
	March 31,				December 31,				November 13,
Fiscal Year 14	2015				2014				2014
Risk-free interest rate		1.28	%			1.61	%			1.64	%
Expected annual dividend yield		—	%			—	%			—	%
Expected volatility		75.96	%			78.00	%			72.86	%
Term  (years)		4.62				4.87				5.00
Fair value	$2.5 million				$3.2 million				$4.3 million

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Tabular disclosure of the application of the fair value option for measurement and reporting of eligible financial assets and liabilities (as defined), as well as certain other eligible items (as defined) included in the statement of financial position, whether such option is elected for a single eligible item or a group of similar eligible items and is in addition to other disclosures concerning fair value which the company may be required to provide. Such disclosure might be expected to include: (1) for items included in the statement of financial position: (a) for each line item in the statement of financial position that includes an item or items for which the fair value option has been elected, provide the aggregate carrying amount of ineligible items included in each line item in the balance sheet, if any; (b) the difference between the aggregate fair value and the aggregate unpaid principal balance (assuming contractual principal amounts and fair value option elected) of: (i) loans and long-term receivables (other than securities otherwise reported at fair value) and (ii) long-term debt instruments; (c) for loans held as assets for which the fair value option has been elected: (i) the aggregate fair value of loans that are 90 days or more past due, (ii) if the policy is to recognize interest income separately from other changes in fair value, the aggregate fair value of loans in nonaccrual status, and (iii) the difference between the aggregate fair value and the aggregate unpaid principal balance for loans that are 90 days or more past due, in nonaccrual status, or both; (2) for items included in the income statement: (a) the amounts of gains and losses from fair value changes included in earnings and in which line in the income statement those gains and losses are reported whether or not combined with gains and losses from items required to be accounted for at fair value; (b) for loans and other receivables held as assets, the estimated amount of gains or losses included in earnings attributable to changes in instrument-specific credit risk; (c) for liabilities with fair values that have been significantly affected during the reporting period by changes in the instrument-specific credit risk, the estimated amount of gains and losses from fair value changes included in earnings that are attributable to changes in the instrument-specific credit risk; and (3) certain other disclosures as required or determined to be provided.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 30
-URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14172-108612

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14217-108612

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 28
-Subparagraph (c)(2),(d),(e)
-URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14064-108612

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (a),(c)(1),(d)(1)
-URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14172-108612

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