Stockholders' Equity (Tables)
|
3 Months Ended |
Mar. 31, 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
|
|
322,500
|
|
Exercised
|
|
-
|
|
Forfeit/canceled
|
|
(760,728)
|
|
Expired
|
|
(55,703)
|
|
Outstanding at March 31, 2017
|
|
5,263,949
|
|
|
|
|
|
| Stock-Based Compensation Expense |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Three Months Ended
|
|
|
|
|
March 31,
|
|
|
|
|
2017
|
|
2016
|
|
|
General and administrative
|
|
$
|
222,543
|
|
$
|
239,504
|
|
|
Sales and marketing
|
|
|
59,822
|
|
|
51,704
|
|
|
Engineering, research, and development
|
|
|
(7,472)
|
|
|
27,900
|
|
|
|
|
$
|
274,893
|
|
$
|
319,108
|
|
|
| Valuation Assumptions |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Three Months Ended
|
|
|
|
March 31,
|
|
|
|
2017
|
|
2016
|
|
Risk-free interest rate
|
|
2.04
|
%
|
|
1.56
|
%
|
|
Expected life (years)
|
|
6.00
|
|
|
6.00
|
|
|
Expected dividend yield
|
|
-
|
%
|
|
-
|
%
|
|
Expected volatility
|
|
86
|
%
|
|
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
|
|
|
112,845
|
|
$
|
0.72
|
|
|
-
|
|
$
|
-
|
|
Released
|
|
|
-
|
|
$
|
-
|
|
|
-
|
|
$
|
-
|
|
Canceled/forfeited/expired
|
|
|
-
|
|
$
|
-
|
|
|
-
|
|
$
|
-
|
|
Outstanding at March 31, 2017
|
|
|
1,107,262
|
|
$
|
0.48
|
|
|
0.75
|
|
$
|
863,664
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Expected to vest at March 31, 2017
|
|
|
1,107,262
|
|
$
|
-
|
|
|
-
|
|
$
|
863,664
|
|
Exercisable at March 31, 2017
|
|
|
862,232
|
|
$
|
-
|
|
|
-
|
|
$
|
672,541
|
|
Unvested at March 31, 2017
|
|
|
245,030
|
|
$
|
-
|
|
|
-
|
|
$
|
191,123
|
|
Unrecognized expense at March 31, 2017
|
|
$
|
162,687
|
|
|
|
|
|
|
|
|
|
|
| Restricted Stock Units (RSUs) [Member] |
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
| Stock-Based Compensation Expense |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Three Months Ended
|
|
|
|
March 31,
|
|
|
|
2017
|
|
2016
|
|
General and administrative
|
|
$
|
62,524
|
|
$
|
37,501
|
|
|
|
$
|
62,524
|
|
$
|
37,501
|
|