Stockholders’ Equity (Tables)
|
9 Months Ended |
Sep. 30, 2018 |
|---|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
| Stock Option Activity |
|
|
|
|
|
|
|
|
Options
|
|
Outstanding at December 31, 2016
|
5,757,880
|
|
Granted
|
3,027,500
|
|
Exercised
|
(152,085)
|
|
Forfeit/canceled
|
(1,451,053)
|
|
Expired
|
(363,294)
|
|
Outstanding at December 31, 2017
|
6,818,948
|
|
Granted
|
550,000
|
|
Exercised
|
(12,500)
|
|
Forfeit/canceled
|
(1,162,319)
|
|
Expired
|
(1,308,786)
|
|
Outstanding at September 30, 2018
|
4,885,343
|
|
|
|
|
| Stock-Based Compensation Expense |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Three Months Ended
|
Nine Months Ended
|
|
|
|
September 30,
|
September 30,
|
|
|
|
2018
|
|
2017
|
2018
|
|
2017
|
|
General and administrative
|
|
$
|
111,003
|
|
$
|
137,395
|
$
|
328,854
|
|
$
|
432,322
|
|
Sales and marketing
|
|
|
4,982
|
|
|
51,686
|
|
129,079
|
|
|
115,290
|
|
Engineering, research, and development
|
|
|
34,525
|
|
|
53,294
|
|
100,321
|
|
|
130,688
|
|
|
|
$
|
150,510
|
|
$
|
242,375
|
$
|
558,254
|
|
$
|
678,300
|
|
| Valuation Assumptions |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Nine Months Ended
|
|
|
|
September 30,
|
|
|
|
2018
|
|
2017
|
|
Risk-free interest rate
|
|
2.65%
|
|
1.96%
|
|
Expected life (years)
|
|
6.00
|
|
6.00
|
|
Expected dividend yield
|
|
-
|
|
-
|
|
Expected volatility
|
|
104.06%
|
|
84.94%
|
|
| Restricted Stock Unit Activity |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Shares
|
|
Weighted Average
Grant Date Fair Value
|
|
Weighted Average
Remaining
Contractual Term
(Years)
|
|
Aggregate
Intrinsic Value
|
|
Outstanding at December 31, 2016
|
|
|
994,417
|
|
$
|
0.72
|
|
|
0.08
|
|
$
|
731,845
|
|
Awarded
|
|
|
199,513
|
|
$
|
0.73
|
|
|
0.70
|
|
$
|
-
|
|
Released
|
|
|
(484,058)
|
|
$
|
-
|
|
|
-
|
|
$
|
-
|
|
Canceled/forfeited/expired
|
|
|
(47,072)
|
|
$
|
0.72
|
|
|
-
|
|
$
|
-
|
|
Outstanding at December 31, 2017
|
|
|
662,800
|
|
$
|
0.72
|
|
|
0.70
|
|
$
|
795,360
|
|
Awarded
|
|
|
-
|
|
$
|
-
|
|
|
-
|
|
$
|
-
|
|
Released
|
|
|
-
|
|
$
|
-
|
|
|
-
|
|
$
|
-
|
|
Canceled/forfeited/expired
|
|
|
-
|
|
$
|
-
|
|
|
-
|
|
$
|
-
|
|
Outstanding at September 30, 2018
|
|
|
662,800
|
|
$
|
0.72
|
|
|
-
|
|
$
|
516,984
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Expected to vest at September 30, 2018
|
|
|
662,800
|
|
$
|
-
|
|
|
-
|
|
$
|
516,984
|
|
Vested at September 30, 2018
|
|
|
662,800
|
|
$
|
-
|
|
|
-
|
|
$
|
516,984
|
|
Unvested at September 30, 2018
|
|
|
-
|
|
$
|
-
|
|
|
-
|
|
$
|
-
|
|
Unrecognized expense at September 30, 2018
|
|
$
|
-
|
|
|
|
|
|
|
|
|
|
|
| Restricted Stock Units (RSUs) [Member] |
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
| Stock-Based Compensation Expense |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Three Months Ended
|
|
Nine Months Ended
|
|
|
|
September 30,
|
|
September 30,
|
|
|
|
2018
|
|
2017
|
|
2018
|
|
2017
|
|
General and administrative
|
|
$
|
-
|
|
$
|
(93,935)
|
|
$
|
30,546
|
|
$
|
177,438
|
|
|
|
$
|
-
|
|
$
|
(93,935)
|
|
$
|
30,546
|
|
$
|
177,438
|
|