Quarterly report pursuant to Section 13 or 15(d)

Stock Plans

v3.2.0.727
Stock Plans
6 Months Ended
Jun. 30, 2015
Stock Plans [Abstract]  
Stock Plans [Text Block]
2. Stock Plans
 
The following table summarizes the stock-based compensation expense recorded for awards under the stock option plans for the three and six month periods ended June 30, 2015 and 2014:
 
 
 
Three Months Ended
 
Six Months Ended
 
 
 
June 30,
 
June 30,
 
(in thousands, except per share amounts)
 
2015
 
2014
 
2015
 
2014
 
Research and development
 
$
35
 
$
28
 
$
238
 
$
173
 
General and administrative
 
 
41
 
 
32
 
 
329
 
 
213
 
Total stock-based compensation expenses
 
$
76
 
$
60
 
$
567
 
$
386
 
 
No tax benefit was recognized related to stock-based compensation expense since we have incurred operating losses and we have established a full valuation allowance to offset all the potential tax benefits associated with our deferred tax assets.
 
We use the Black-Scholes-Merton option-pricing model with the following assumptions to estimate the stock-based compensation expense for the three and six month periods ended June 30, 2015 and 2014:
 
 
 
Three Months Ended
 
Six Months Ended
 
 
 
June 30,
 
June 30,
 
 
 
2015
 
2014
 
2015
 
2014
 
Weighted-average risk-free interest rate
 
 
1.7
%
 
1.7
%
 
1.8
%
 
2.0
%
Expected dividend payments
 
 
 
 
 
 
 
 
 
Expected holding period (years) 1
 
 
4.5
 
 
4.2
 
 
6.4
 
 
6.5
 
Weighted-average volatility factor 2
 
 
1.65
 
 
1.67
 
 
1.61
 
 
1.66
 
Estimated forfeiture rates 3
 
 
30
%
 
31
%
 
30
%
 
31
%
 
 
 
 
(1)
Expected holding periods are based on the simplified method provided in Staff Accounting Bulletin No. 107 for “plain vanilla options.”
 
(2)
Weighted average volatility is based on the historical volatility of our common stock.
 
(3)
Estimated forfeiture rates are based on historical data.
 
No options were granted during the three month periods ended June 30, 2015 and 2014.
 
The following table summarizes option activity for the six month period ended June 30, 2015:
 
 
 
 
 
 
 
Weighted
 
 
 
 
 
 
 
Weighted
 
Average
 
 
 
 
 
 
 
Average
 
Remaining
 
Aggregate
 
 
 
 
 
Exercise
 
Option
 
Intrinsic
 
(in thousands, except per share amounts)
 
Options
 
Price
 
Term
 
Value
 
Outstanding at January 1, 2015
 
 
6,620
 
$
1.23
 
 
5.14
 
$
1
 
Granted
 
 
1,374
 
 
0.60
 
 
 
 
 
 
 
Exercised
 
 
 
 
 
 
 
 
 
 
 
Expired or cancelled
 
 
(70)
 
 
2.62
 
 
 
 
 
 
 
Forfeited
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Outstanding at June 30, 2015
 
 
7,924
 
$
1.11
 
 
5.58
 
$
147
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Exercisable at June 30, 2015
 
 
7,250
 
$
1.15
 
 
5.19
 
$
78
 
  
No shares of restricted stock were awarded to employees, directors and consultants during the three month periods ended June 30, 2015 and 2014.
 
The following table summarizes restricted stock activity for the six month period ended June 30, 2015:
 
 
 
 
 
Weighted
 
Weighted
 
 
 
 
 
 
 
Average
 
Average
 
Aggregate
 
 
 
Restricted
 
Exercise
 
Remaining
 
Intrinsic
 
(in thousands, except per share amounts)
 
Stock
 
Price
 
Term
 
Value
 
Outstanding at January 1, 2015
 
 
359
 
$
 
 
9.12
 
$
166
 
Granted
 
 
 
 
 
 
 
 
 
 
 
Released
 
 
(359)
 
 
 
 
 
 
 
 
 
Expired or cancelled
 
 
 
 
 
 
 
 
 
 
 
Forfeited
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Outstanding at June 30, 2015
 
 
 
$
 
 
 
$
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Exercisable at June 30, 2015
 
 
 
$
 
 
 
$
 
 
As of June 30, 2015, there was approximately $205,000 of total unrecognized compensation expense related to non-vested stock options and restricted stock. This expense is expected to be recognized over a weighted-average period of 0.7 years.