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Stock-based compensation.
 12 Months Ended
Dec. 31, 2020
Share-based Payment Arrangement [Abstract]  
STOCK-BASED COMPENSATION.
14.STOCK-BASED COMPENSATION.

The Company has two equity incentive compensation plans: a 2006 Stock Incentive Plan and a 2016 Stock Incentive Plan.


2006 Stock Incentive Plan – The 2006 Stock Incentive Plan authorized the issuance of incentive stock options (“ISOs”) and non-qualified stock options (“NQOs”), restricted stock, restricted stock units, stock appreciation rights, direct stock issuances and other stock-based awards to the Company’s officers, directors or key employees or to consultants that do business with the Company for up to an aggregate of 1,715,000 shares of common stock. In June 2016, the 2006 Stock Incentive plan was terminated, except to the extent of issued and outstanding unvested stock awards and options.


2016 Stock Incentive Plan – On June 16, 2016, the Company’s shareholders approved the 2016 Stock Incentive Plan, which authorizes the issuance of ISOs, NQOs, restricted stock, restricted stock units, stock appreciation rights, direct stock issuances and other stock-based awards to the Company’s officers, directors or key employees or to consultants that do business with the Company initially for up to an aggregate of 1,150,000 shares of common stock. On June 14, 2018, the Company’s shareholders approved an increase to the aggregate number of shares authorized under the 2016 Stock Incentive Plan to 3,650,000 shares. On November 7, 2019, the Company’s shareholders approved an increase to the aggregate number of shares authorized under the 2016 Stock Incentive Plan to 5,650,000 shares. On November 18, 2020, the Company’s shareholders approved an increase to the aggregate number of shares authorized under the 2016 Stock Incentive Plan to 7,400,000 shares.


Stock Options – Summaries of the status of Company’s stock option plans as of December 31, 2020 and 2019 and of changes in options outstanding under the Company’s plans during those years are as follows (number of shares in thousands):


   Years Ended December 31, 
   2020   2019 
   Number
of Shares		   Weighted
Average
Exercise Price		   Number
of Shares		   Weighted
Average
Exercise Price		 
Outstanding at beginning of year   229   $4.15    229   $4.15 
Options exercised   (22)   3.74    —    — 
Outstanding at end of year   207   $4.16    229   $4.15 
Options exercisable at end of year   207   $4.16    229   $4.15 

Stock options outstanding as of December 31, 2020 were as follows (number of shares in thousands): 


    Options Outstanding   Options Exercisable 
Range of
Exercise
Prices		   Number
Outstanding		   Weighted
Average
Remaining
Contractual
Life (yrs.)		   Weighted
Average
Exercise
Price		   Number
Exercisable		   Weighted
Average
Exercise
Price		 
                      
$3.74    197    2.47   $3.74    197   $3.74 
$12.90    10    0.59   $12.90    10   $12.90 

The aggregate intrinsic value of the options outstanding was $262,000 and $0 as of December 31, 2020 and 2019, respectively.


Restricted Stock – A summary of unvested restricted stock activity is as follows (shares in thousands):


   Number of
Shares		   Weighted
Average
Grant Date
Fair Value
Per Share		 
Unvested at December 31, 2019   2,201   $1.84 
Issued   1,663   $1.25 
Vested   (1,290)  $2.08 
Canceled   (314)  $1.33 
Unvested at December 31, 2020   2,260   $1.34 

The fair value of the common stock at vesting aggregated $1,639,000 and $599,000 for the years ended December 31, 2020 and 2019, respectively. Stock-based compensation expense related to employee and non-employee restricted stock and option grants recognized in the accompanying consolidated statements of operations, was as follows (in thousands):


   Years Ended December 31, 
   2020   2019 
Employees  $2,025   $2,422 
Non-employees   654    387 
Total stock-based compensation expense  $2,679   $2,809 

Employee grants typically have a two or three-year vesting schedule, while non-employee grants have a one-year vesting schedule. At December 31, 2020, the total compensation expense related to unvested awards which had not been recognized was $865,000 and the associated weighted-average period over which the compensation expense attributable to those unvested awards will be recognized was approximately 1.37 years.