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Share-Based Compensation - Additional Information (Detail) |  | 1 Months Ended | 3 Months Ended
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Feb. 01, 2014 shares | Mar. 31, 2016 Installment shares | May. 31, 2015 Installment shares | Mar. 31, 2015 Installment shares | Apr. 30, 2016 USD ($) Equity_Plan $ / shares shares | Aug. 01, 2015 USD ($) | May. 02, 2015 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Number of equity incentive plan | Equity_Plan |  |  |  |  | 2 |  |
Number of options, granted |  |  |  |  | 50,000 |  |
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 |  |  |  |  | $ 2.86 |  | $ 2.43
Reservation of shares under Stock Purchase Plan |  |  |  |  | 247,500 |  |
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 |  |  |  |  | 84,650 |  |
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 |  |  |  |  | 234,264 |  |
Employee Stock Purchase Plan [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Shares available for grant under the Plan |  |  |  |  | 50,003 |  |
Employee Stock Purchase Plan discount rate |  |  |  |  | 15.00% |  |
Shares purchase under Employee Stock Purchase Plan |  |  |  |  | 1,597 |  | 732
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 |  |
Chief Executive Officer [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Number of options, granted |  | 50,000 |  | 50,000 |  |  |
Chief Executive Officer [Member] | 2007 Equity Incentive Plan [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Shares available for grant under the Plan |  |  |  |  | 50,000 |  |
Non-Employee Director [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
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 |
Other Key Employees [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Number of options, granted |  |  |  | 35,000 |  |  |
Stock Options [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Unrecognized compensation expense related to options | $ |  |  |  |  | $ 493,000 |  |
Unrecognized compensation expense to be recognized, Weighted average period |  |  |  |  | 2 years 10 months 24 days |  |
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 |  |
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 |  |  |  |  | 567 |  |
RSA [Member] | Chief Executive Officer [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Restricted stocks, granted |  | 4,030 |  | 537 |  |  |
RSA [Member] | Non-Employee Director [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Award vesting period |  |  |  |  | 12 months |  |
Restricted Stock And Stock Option [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Number of annual vesting installments | Installment |  | 4 |  | 4 |  |  |
2014 Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Number of accelerated vesting shares | 4,166 |  |  |  |  |  |
Number of vesting shares |  |  |  |  | 9,300 |  |
Unrecognized compensation expense to be recognized, Weighted average period |  |  |  |  | 2 years 8 months 12 days |  |
Unrecognized compensation expense related to RSUs and RSAs | $ |  |  |  |  | $ 1,191,000 |  |
2014 Restricted Stock Units (RSUs) [Member] | Third Anniversary [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Number of vesting shares |  |  |  |  | 9,300 |  |
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% |  |
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 |  |  |  |
Performance Based Restricted Stock Units RSUs [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Number of vesting shares |  |  |  |  | 15,810 |  |

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