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v3.5.0.2

Debt - Additional Information (Detail) - USD ($) |  |  |  | 3 Months Ended
--- | --- | --- | --- | ---
Apr. 29, 2015 | Dec. 19, 2014 | Nov. 15, 2013 | Jun. 30, 2016 | Jun. 30, 2015
Debt Instrument [Line Items] |  |  |  |  |
Proceeds from additional equity offering (more than) | $ 22,300,000 |  |  |  |
Non-cash interest expense amortization of debt discount (lless than $0.1 million each for Term Loan B and Term Loan C) |  |  |  | $ 100,000 | $ 100,000
Interest expense, debt |  |  |  | 200,000 | 300,000
FIrst Warrants | Senior Secured Loan | Hercules Technology Growth Capital |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Number of shares received from warrants received to purchase common stock (in shares) |  | 13,927 |  |  |
Fair value of warrants issued |  | $ 400,000 |  |  |
Second Warrants | Senior Secured Loan | Hercules Technology Growth Capital |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Number of shares received from warrants received to purchase common stock (in shares) |  | 25,641 |  |  |
Fair value of warrants issued |  | $ 200,000 |  |  |
Hercules Warrants | Senior Secured Loan | Hercules Technology Growth Capital |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Number of shares received from warrants received to purchase common stock (in shares) |  | 58,823 |  |  |
Warrant exercise price (in dollars per share) | $ 9.41 | $ 11.00 |  |  |
Term Loan B | Senior Secured Loan | Hercules Technology Growth Capital |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt, face amount |  |  | $ 10,000,000.0 |  |
Net proceeds from debt |  |  | $ 9,800,000 |  |
Interest rate, stated percentage |  |  | 11.00% |  |
Outstanding principal balance |  |  |  | 1,700,000 |
End of term fee |  |  |  | 500,000 |
Minimum amount of proceeds from specified asset dispositions for mandatory prepayment feature |  |  |  | 1,000,000 |
Debt discount |  |  | $ 200,000 |  |
Term Loan B | Hercules Warrants | Senior Secured Loan | Hercules Technology Growth Capital |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Unamortized discount (premium) and debt issuance costs |  | $ 1,000,000 |  |  |
Non-cash interest expense amortization of debt discount (lless than $0.1 million each for Term Loan B and Term Loan C) |  |  |  | 100,000 | 100,000
Term Loan C | Senior Secured Loan | Hercules Technology Growth Capital |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt, face amount |  | 1,500,000.0 |  |  |
Net proceeds from debt |  | $ 1,400,000 |  |  |
Interest rate, stated percentage |  | 11.00% |  |  |
End of term fee |  |  |  | $ 100,000 |
Debt discount |  |  | $ 100,000 |  |
Debt instrument, maturity date |  |  |  | Jun. 01, 2017 |
Proceeds from additional equity offering (more than) |  |  |  | $ 10,000,000 |
Term Loan C | Hercules Warrants | Senior Secured Loan | Hercules Technology Growth Capital |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Unamortized discount (premium) and debt issuance costs |  | $ 300,000 |  |  |
Non-cash interest expense amortization of debt discount (lless than $0.1 million each for Term Loan B and Term Loan C) |  |  |  | 100,000 | $ 100,000
Term Loan | Senior Secured Loan | Hercules Technology Growth Capital |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Covenant, unrestricted cash balance requirement |  |  |  | $ 2,000,000 |
Prime Rate | Term Loan B | Senior Secured Loan | Hercules Technology Growth Capital |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument, basis spread on prime rate |  |  | 3.75% |  |
Prime Rate | Term Loan C | Senior Secured Loan | Hercules Technology Growth Capital |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument, basis spread on prime rate |  | 3.75% |  |  |

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- Definition Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28541-108399 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + 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 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount, after accumulated amortization, of debt discount. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28541-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400 + Details
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