Debt - Additional Information (Detail)
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6 Months Ended |
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Sep. 28, 2016
USD ($)
$ / shares
shares
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Aug. 26, 2016
USD ($)
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Aug. 12, 2016
USD ($)
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Jul. 15, 2016
USD ($)
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Sep. 30, 2016
USD ($)
trading_day
shares
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Jun. 09, 2016
$ / shares
shares
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| Debt Instrument [Line Items] |
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| Warrants issued (shares) | shares |
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30,000
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| Warrant exercise price (in usd per share) | $ / shares |
$ 1.364
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$ 1.08
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| Repayments of debt |
$ 11,000,000
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| Subordinated Debenture |
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| Debt Instrument [Line Items] |
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| Debt restructuring cost |
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$ 50,000
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$ 15,000
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$ 75,000
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| Convertible notes |
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| Debt Instrument [Line Items] |
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| Debt face amount |
$ 16,000,000
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$ 16,000,000
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| Interest rate |
8.75%
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| Gross amount |
$ 11,084,000
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| Issuance costs |
$ 1,700,000
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| Debt issuance costs and discount |
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6,616,000
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| Long-term debt |
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$ 9,384,000
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| Purchase price of principal |
92.75%
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| Warrants issued (shares) | shares |
250,000
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4,105,600
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| Right to receive cash |
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2.50%
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| Convertible debt conversion price ($ per share) | $ / shares |
$ 1.364
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| Redemption price |
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$ 1,000
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| Redemption price as of principal if fundamental change |
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120.00%
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| Common equity threshold |
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50.00%
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| Warrant to purchase (in shares) | shares |
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256.60
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| Warrant exercise price (in usd per share) | $ / shares |
$ 1.364
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| Proceeds from debt |
$ 14,316,000
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| Initial Purchaser Of Warrants |
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| Debt Instrument [Line Items] |
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| Warrants issued (shares) | shares |
250,000
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| Holder Of Notes |
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| Debt Instrument [Line Items] |
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| Warrants issued (shares) | shares |
4,105,600
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| North Atlantic Capital |
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| Debt Instrument [Line Items] |
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| Repayments of debt |
$ 8,000,000
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| Silicon Valley Bank |
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| Debt Instrument [Line Items] |
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| Repayments of debt |
3,000,000
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| Conversion period one | Convertible notes |
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| Debt Instrument [Line Items] |
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| Stock price threshold |
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200.00%
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| Number of trading days threshold | trading_day |
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20
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| Trading day threshold after notice given |
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5 days
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| Consecutive trading day period |
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30 days
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| Conversion period two | Convertible notes |
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| Debt Instrument [Line Items] |
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| Stock price threshold |
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150.00%
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| Consecutive trading day period |
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15 days
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| Convertible note embedded derivative liability | Convertible notes |
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| Debt Instrument [Line Items] |
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| Derivative liability |
3,693,000
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| Warrant liability | Convertible notes |
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| Debt Instrument [Line Items] |
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| Derivative liability |
$ 1,223,000
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