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Long-Term Debt and Lines of Credit - Lines of Credit - Narrative (Detail)
9 Months Ended 12 Months Ended
Mar. 10, 2016
USD ($)
Mar. 08, 2016
USD ($)
Jul. 10, 2015
USD ($)
Jan. 31, 2016
USD ($)
May. 03, 2015
USD ($)
Mar. 08, 2016
CNY (¥)
Jan. 31, 2016
CNY (¥)
Feb. 01, 2015
USD ($)
United States [Member] | Revolving Credit Facility [Member]                
Line of Credit Facility [Line Items]                
Maximum borrowing capacity       $ 10,000,000 $ 10,000,000      
Interest rate description       Interest is charged at a rate equal to the one-month LIBOR rate plus a spread based on our ratio of debt to EBITDA as defined in the agreement.        
Expiration date     Aug. 31, 2017   Aug. 31, 2015      
Reference rate on which the interest rate is based       One-month LIBOR rate        
Applicable interest rate at end of period       1.93% 1.78%   1.93% 1.77%
Annual capital expenditures limit     $ 12,000,000          
Letter of credit, outstanding amount       $ 250,000 $ 250,000     $ 250,000
Outstanding amount       0 0     0
China [Member] | Revolving credit agreement [Member]                
Line of Credit Facility [Line Items]                
Maximum borrowing capacity       $ 6,100,000     ¥ 40,000,000  
Interest rate description       This agreement had an interest rate determined by the Chinese government.        
Expiration date       Feb. 09, 2016        
Outstanding amount       $ 0 $ 0   ¥ 0 $ 0
China [Member] | Subsequent Event [Member] | Revolving credit agreement [Member]                
Line of Credit Facility [Line Items]                
Maximum borrowing capacity   $ 6,100,000       ¥ 40,000,000    
Expiration date   Mar. 08, 2017            
Second Amendment [Member] | United States [Member] | Subsequent Event [Member] | Revolving Credit Facility [Member]                
Line of Credit Facility [Line Items]                
Maximum borrowing capacity $ 30,000,000              
Interest rate description Variable spread over LIBOR, based upon the company's ratio of debt to EBITDA              
Reference rate on which the interest rate is based LIBOR              
Annual capital expenditures limit $ 15,000,000              
Percentage of common stock in subsidiary pledge as collateral 65.00%