Quarterly report pursuant to Section 13 or 15(d)

Debt - Additional Information (Detail)

v3.5.0.2
Debt - Additional Information (Detail)
6 Months Ended
Sep. 28, 2016
USD ($)
$ / shares
shares
Aug. 26, 2016
USD ($)
Aug. 12, 2016
USD ($)
Jul. 15, 2016
USD ($)
Sep. 30, 2016
USD ($)
trading_day
shares
Jun. 09, 2016
$ / shares
shares
Debt Instrument [Line Items]            
Warrants issued (shares) | shares           30,000
Warrant exercise price (in usd per share) | $ / shares $ 1.364         $ 1.08
Repayments of debt $ 11,000,000          
Subordinated Debenture            
Debt Instrument [Line Items]            
Debt restructuring cost   $ 50,000 $ 15,000 $ 75,000    
Convertible notes            
Debt Instrument [Line Items]            
Debt face amount $ 16,000,000       $ 16,000,000  
Interest rate 8.75%          
Gross amount $ 11,084,000          
Issuance costs $ 1,700,000          
Debt issuance costs and discount         6,616,000  
Long-term debt         $ 9,384,000  
Purchase price of principal 92.75%          
Warrants issued (shares) | shares 250,000       4,105,600  
Right to receive cash         2.50%  
Convertible debt conversion price ($ per share) | $ / shares $ 1.364          
Redemption price         $ 1,000  
Redemption price as of principal if fundamental change         120.00%  
Common equity threshold         50.00%  
Warrant to purchase (in shares) | shares         256.60  
Warrant exercise price (in usd per share) | $ / shares $ 1.364          
Proceeds from debt $ 14,316,000          
Initial Purchaser Of Warrants            
Debt Instrument [Line Items]            
Warrants issued (shares) | shares 250,000          
Holder Of Notes            
Debt Instrument [Line Items]            
Warrants issued (shares) | shares 4,105,600          
North Atlantic Capital            
Debt Instrument [Line Items]            
Repayments of debt $ 8,000,000          
Silicon Valley Bank            
Debt Instrument [Line Items]            
Repayments of debt 3,000,000          
Conversion period one | Convertible notes            
Debt Instrument [Line Items]            
Stock price threshold         200.00%  
Number of trading days threshold | trading_day         20  
Trading day threshold after notice given         5 days  
Consecutive trading day period         30 days  
Conversion period two | Convertible notes            
Debt Instrument [Line Items]            
Stock price threshold         150.00%  
Consecutive trading day period         15 days  
Convertible note embedded derivative liability | Convertible notes            
Debt Instrument [Line Items]            
Derivative liability 3,693,000          
Warrant liability | Convertible notes            
Debt Instrument [Line Items]            
Derivative liability $ 1,223,000