Note 8 - Stock-based Incentive Plans (Tables)
|
12 Months Ended |
Dec. 31, 2022 |
|---|
| Notes Tables |
|
| Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
| |
|
2022
|
|
|
2021
|
|
|
Expected Volatility
|
|
|
95 |
% |
|
|
95 |
% |
|
Risk–free interest rate
|
|
|
2.89 |
% |
|
|
.99 |
% |
|
Dividend yield
|
|
|
- |
% |
|
|
- |
% |
|
Expected life of options (in years)
|
|
|
6.08 |
|
|
|
5.86 |
|
|
| Share-Based Payment Arrangement, Option, Activity [Table Text Block] |
| |
|
|
|
|
|
Weighted-Average
|
|
|
|
|
|
| |
|
Options (#)
|
|
|
Exercise
Price Per Share ($)
|
|
|
Remaining
Contractual Term (Years)
|
|
|
Aggregate
Intrinsic Value ($)
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Outstanding at December 31, 2021
|
|
|
2,433,000 |
|
|
$ |
5.18 |
|
|
|
|
|
|
$ |
246,000 |
|
|
Granted
|
|
|
239,000 |
|
|
$ |
1.51 |
|
|
|
|
|
|
|
|
|
|
Exercised
|
|
|
- |
|
|
$
|
- |
|
|
|
|
|
|
|
|
|
|
Canceled / forfeited
|
|
|
(194,000 |
)
|
|
$ |
4.23 |
|
|
|
|
|
|
|
|
|
|
Outstanding at December 31, 2022
|
|
|
2,478,000 |
|
|
$ |
4.90 |
|
|
|
6.87 |
|
|
$ |
4,000 |
|
|
Vested and exercisable at December 31, 2022
|
|
|
1,569,000 |
|
|
$ |
5.80 |
|
|
|
5.99 |
|
|
$ |
4,000 |
|
|
| Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] |
| |
|
2014 Plan Activity
|
|
|
Outside of the 2014 Plan Activity |
|
|
Totals
|
|
|
Non-vested Restricted Stock
|
|
Restricted
Stock
Units (#)
|
|
|
Weighted Average
Grant Date
Fair Value ($)
|
|
|
Restricted
Stock
Units (#)
|
|
|
Weighted Average
Grant Date
Fair Value ($)
|
|
|
Restricted
Stock
Units (#)
|
|
|
Weighted Average
Grant Date
Fair Value ($)
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
At December 31, 2021
|
|
|
361,000 |
|
|
$ |
4.92 |
|
|
|
- |
|
|
$ |
- |
|
|
|
361,000 |
|
|
$ |
4.92 |
|
|
Granted
|
|
|
1,940,000 |
|
|
$ |
1.57 |
|
|
|
140,000 |
|
|
$ |
0.91 |
|
|
|
2,080,000 |
|
|
$ |
1.52 |
|
|
Vested
|
|
|
(257,000 |
)
|
|
$ |
4.50 |
|
|
|
(105,000 |
)
|
|
$ |
0.91 |
|
|
|
(362,000 |
)
|
|
$ |
3.46 |
|
|
Canceled
|
|
|
(32,000 |
)
|
|
$ |
1.87 |
|
|
|
- |
|
|
$ |
- |
|
|
|
(32,000 |
)
|
|
$ |
1.87 |
|
|
At December 31, 2022
|
|
|
2,012,000 |
|
|
$ |
1.78 |
|
|
|
35,000 |
|
|
$ |
0.91 |
|
|
|
2,047,000 |
|
|
$ |
1.77 |
|
|
| Share-Based Payment Arrangement, Outstanding Award, Activity, Excluding Option [Table Text Block] |
| |
|
|
|
|
|
Weighted-Average
|
|
|
|
|
|
| |
|
Warrants (#)
|
|
|
Exercise
Price Per Share ($)
|
|
|
Remaining
Contractual Term (Years)
|
|
|
Aggregate
Intrinsic Value ($)
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Outstanding at December 31, 2021
|
|
|
781,000 |
|
|
$ |
10.26 |
|
|
|
|
|
|
|
|
|
|
Granted
|
|
|
500,000 |
|
|
$ |
0.67 |
|
|
|
|
|
|
$ |
- |
|
|
Expired
|
|
|
(116,000 |
)
|
|
$ |
10.80 |
|
|
|
|
|
|
$ |
- |
|
|
Outstanding at December 31, 2022
|
|
|
1,165,000 |
|
|
$ |
6.09 |
|
|
|
4.78 |
|
|
$ |
- |
|
|
Vested and exercisable as of December 31, 2022
|
|
|
665,000 |
|
|
$ |
10.16 |
|
|
|
4.78 |
|
|
$ |
- |
|
|
| Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] |
| |
|
2022
|
|
|
2021
|
|
|
Stock options
|
|
$ |
1,278,000 |
|
|
$ |
1,148,000 |
|
|
Warrants
|
|
|
20,000 |
|
|
|
- |
|
|
Restricted stock units
|
|
|
2,965,000 |
|
|
|
1,233,000 |
|
|
Total noncash stock compensation expense
|
|
$ |
4,263,000 |
|
|
$ |
2,381,000 |
|
| |
|
2022
|
|
|
2021
|
|
|
Sales, marketing and advertising
|
|
$ |
1,079,000 |
|
|
$ |
934,000 |
|
|
Engineering, technology and development
|
|
|
389,000 |
|
|
|
288,000 |
|
|
General and administrative
|
|
|
2,795,000 |
|
|
|
1,159,000 |
|
|
Total noncash stock compensation expense
|
|
$ |
4,263,000 |
|
|
$ |
2,381,000 |
|
|