XML 30 R20.htm IDEA: XBRL DOCUMENT v3.7.0.1
Stock-Based Compensation Arrangements (Tables)
 3 Months Ended
Mar. 31, 2017
Stock-Based Compensation Arrangements [Abstract]  
Total Compensation Cost Recorded for Stock-Based Compensation
Total stock-based compensation is as follows:
 
 
 
Three Months Ended March 31,
 
 
 
2017
 
2016
 
Stock option grants beginning of period
 
$
309,872
 
$
210,340
 
Stock-based arrangements during the period:
 
 
 
 
 
 
 
Stock option grants
 
 
44,976
 
 
3,367
 
Restricted stock issued:
 
 
 
 
 
 
 
Employee stock purchase plan
 
 
1,093
 
 
563
 
 
 
$
355,941
 
$
214,270
 
Schedule of Stock option activity
The following table details stock option activity:
 
 
 
Three Months
 
 
 
Ended March 31, 2017
 
 
 
 
 
Weighted Average
 
 
 
Shares
 
Exercise Price
 
Outstanding, beginning of period
 
 
31,363,319
 
$
0.19
 
Stock options granted
 
 
6,979,994
 
 
0.12
 
Cancelled/Expired
 
 
(911,290)
 
 
0.15
 
Outstanding, end of period
 
 
37,432,023
 
$
0.18
 
Exercisable, end of period
 
 
12,282,593
 
$
0.22