Stockholders' Equity (Tables)
|
9 Months Ended |
Sep. 30, 2017 |
|---|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
| Stock Option Activity |
|
|
|
|
|
|
|
|
|
|
|
Options
|
|
Outstanding at December 31, 2015
|
|
5,043,228
|
|
Granted
|
|
1,771,500
|
|
Exercised
|
|
-
|
|
Forfeit/canceled
|
|
(577,817)
|
|
Expired
|
|
(479,031)
|
|
Outstanding at December 31, 2016
|
|
5,757,880
|
|
Granted
|
|
2,742,500
|
|
Exercised
|
|
(104,168)
|
|
Forfeit/canceled
|
|
(1,363,658)
|
|
Expired
|
|
(235,341)
|
|
Outstanding at September 30, 2017
|
|
6,797,213
|
|
|
|
|
|
| Stock-Based Compensation Expense |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Three Months Ended
|
|
Nine Months Ended
|
|
|
|
September 30,
|
|
September 30,
|
|
|
|
2017
|
|
2016
|
|
2017
|
|
2016
|
|
General and administrative
|
|
$
|
137,395
|
|
$
|
234,069
|
|
$
|
432,322
|
|
$
|
720,058
|
|
Sales and marketing
|
|
|
51,686
|
|
|
87,646
|
|
|
115,290
|
|
|
259,647
|
|
Engineering, research, and development
|
|
|
53,294
|
|
|
37,371
|
|
|
130,688
|
|
|
120,986
|
|
|
|
$
|
242,375
|
|
$
|
359,086
|
|
$
|
678,300
|
|
$
|
1,100,691
|
|
| Valuation Assumptions |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Nine Months Ended
|
|
|
|
September 30,
|
|
|
|
2017
|
|
2016
|
|
Risk-free interest rate
|
|
1.96
|
%
|
|
1.42
|
%
|
|
Expected life (years)
|
|
6.00
|
|
|
6.02
|
|
|
Expected dividend yield
|
|
-
|
%
|
|
-
|
%
|
|
Expected volatility
|
|
85
|
%
|
|
114
|
%
|
|
| Restricted Stock Unit Activity |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Shares
|
|
Weighted Average
Grant Date Fair Value
|
|
Weighted Average
Remaining
Contractual Term
(Years)
|
|
Aggregate
Intrinsic Value
|
|
Outstanding at December 31, 2015
|
|
|
653,937
|
|
$
|
0.32
|
|
|
0.08
|
|
$
|
305,572
|
|
Awarded
|
|
|
340,480
|
|
$
|
0.72
|
|
|
0.70
|
|
$
|
-
|
|
Released
|
|
|
-
|
|
$
|
-
|
|
|
-
|
|
$
|
-
|
|
Canceled/forfeited/expired
|
|
|
-
|
|
$
|
-
|
|
|
-
|
|
$
|
-
|
|
Outstanding at December 31, 2016
|
|
|
994,417
|
|
$
|
0.72
|
|
|
0.70
|
|
$
|
731,845
|
|
Awarded
|
|
|
199,513
|
|
$
|
0.73
|
|
|
-
|
|
$
|
-
|
|
Released
|
|
|
(263,731)
|
|
$
|
-
|
|
|
-
|
|
$
|
-
|
|
Canceled/forfeited/expired
|
|
|
(47,072)
|
|
$
|
0.72
|
|
|
-
|
|
$
|
-
|
|
Outstanding at September 30, 2017
|
|
|
883,127
|
|
$
|
0.65
|
|
|
0.26
|
|
$
|
883,127
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Expected to vest at September 30, 2017
|
|
|
883,127
|
|
$
|
-
|
|
|
-
|
|
$
|
883,127
|
|
Exercisable at September 30, 2017
|
|
|
764,739
|
|
$
|
-
|
|
|
-
|
|
$
|
764,739
|
|
Unvested at September 30, 2017
|
|
|
118,388
|
|
$
|
-
|
|
|
-
|
|
$
|
118,388
|
|
Unrecognized expense at September 30, 2017
|
|
$
|
80,413
|
|
|
|
|
|
|
|
|
|
|
| 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,
|
|
|
|
2017
|
|
2016
|
|
2017
|
|
2016
|
|
General and administrative
|
|
$
|
(93,935)
|
|
$
|
28,970
|
|
$
|
177,438
|
|
$
|
86,558
|
|
|
|
$
|
(93,935)
|
|
$
|
28,970
|
|
$
|
177,438
|
|
$
|
86,558
|
|