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Share-Based Compensation - Additional Information (Detail)
1 Months Ended 3 Months Ended 9 Months Ended
Feb. 01, 2014
shares
May. 31, 2015
Installment
shares
Mar. 31, 2015
Installment
shares
Oct. 31, 2015
USD ($)
shares
Aug. 01, 2015
USD ($)
shares
May. 02, 2015
shares
Oct. 31, 2015
USD ($)
Equity_Plan
$ / shares
shares
Nov. 01, 2014
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Reservation of shares under Stock Purchase Plan             247,500  
Number of equity incentive plan | Equity_Plan             2  
Number of options, granted             110,000  
Non-employee director is entitled to an annual cash retainer | $         $ 7,000      
Non-employee director received restricted stock award value | $             $ 20,000  
Maximum disposal restricted percentage of RSU             50.00%  
Options granted weighted average fair value per share | $ / shares             $ 2.43 $ 2.87
2007 Equity Incentive Plan [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Incentive plan, expiration period             2017-05  
Shares available for grant under the Plan       107,122     107,122  
Reservation of shares under Stock Purchase Plan             100,000  
2015 Equity Incentive Plan [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Incentive plan, expiration period             2025-05  
Shares available for grant under the Plan       240,000     240,000  
Employee Stock Purchase Plan [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Shares available for grant under the Plan       53,210     53,210  
Employee Stock Purchase Plan discount rate             15.00%  
Shares purchase under Employee Stock Purchase Plan             3,795 2,464
Maximum [Member] | 2015 Equity Incentive Plan [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Maximum number of shares of common stock of the Company authorized for issuance       500,000     500,000  
Non-Employee Director [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Number of options, granted         25,000      
Non-employee director is entitled to an annual cash retainer additional | $         $ 500      
Chairman of Board [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Amount of Chair Retainer payable | $         6,000      
Chair of Audit Committee [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Amount of Chair Retainer payable | $         4,000      
Chair of Compensation Committee [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Amount of Chair Retainer payable | $         $ 4,000      
Chief Executive Officer [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Number of options, granted     50,000          
Other Key Employees [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Number of options, granted     35,000          
RSA [Member] | Non-Employee Director [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Award vesting period             12 months  
RSA [Member] | Chief Executive Officer [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Restricted stocks, granted     537          
Stock Options [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Unrecognized compensation expense related to unvested options | $       $ 508,000     $ 508,000  
Unrecognized compensation expense related to unvested options, recognize date             Through March 2019  
Stock Options [Member] | 2007 Equity Incentive Plan [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Award vesting period             4 years  
Option expiration period             10 years  
Stock Options [Member] | 2015 Equity Incentive Plan [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Award vesting period             4 years  
Option expiration period             10 years  
2013 Restricted Stock Units (RSUs) [Member] | First Anniversary [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Restricted stock unit vested percentage             50.00%  
2013 Restricted Stock Units (RSUs) [Member] | Second Anniversary [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Restricted stock unit vested percentage             50.00%  
2014 Restricted Stock Units (RSUs) [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Number of accelerated vesting shares 4,166           0  
Unrecognized compensation expense related to unvested options, recognize date             Through May 2019  
Unrecognized compensation expense related to unvested RSUs and RSAs | $       $ 1,531,000     $ 1,531,000  
2014 Restricted Stock Units (RSUs) [Member] | Officer [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Cumulative budgeted net sales target measurement period             2014 through 2016  
2014 Restricted Stock Units (RSUs) [Member] | Officer [Member] | Net Sales Target [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Restricted stock unit vested percentage             50.00%  
2014 Restricted Stock Units (RSUs) [Member] | Officer [Member] | ORONA Target [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Restricted stock unit vested percentage             25.00%  
2014 Restricted Stock Units (RSUs) [Member] | Officer [Member] | Third Anniversary [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Restricted stock unit vested percentage             25.00%  
Equity Incentive Plan [Member] | Non-Employee Director [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Option expiration period             10 years  
Number of options, granted             5,000  
Number of stock options grant to each non-employee director       752 722 698    
Restricted Stock And Stock Option [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Number of annual vesting installments | Installment     4          
Time Based RSUs [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Restricted stocks, granted   80,000            
Number of annual vesting installments | Installment   4            
Performance Based RSUs [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Award vesting period   3 years            
Restricted stocks, granted   155,000