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Share-based Compensation (Tables)
 9 Months Ended
Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Stock Option Activity

A summary of the stock option activity under the Company’s plans for the nine months ended September 30, 2017 is as follows:

 

    Number of shares   Weighted average
exercise price
         
Options outstanding at beginning of year     850,232     $ 8.06  
Granted     105,000       9.90  
Less:                
Exercised     (178,662 )     5.90  
Forfeited prior to vesting     (7,103 )     10.88  
Canceled or expired     (2,311 )     9.68  
Options outstanding at September 30, 2017     767,156       8.79  
Options exercisable at end of September 30, 2017     502,940     $ 7.71  
Schedule of Share-based Compensation Expense

Share-based compensation expense related to ESPP has been recorded as follows:

 

    Three months ended September 30,   Nine months ended September 30,
    2017   2016   2017   2016
Cost of goods sold   $ 5     $ 7     $ 16     $ 18  
Sales and marketing     10       15       31       42  
Research and product development     25       40       80       106  
General and administrative     122       113       341       328  
    $ 162     $ 175     $ 468     $ 494