Note 8 - Stock-based Incentive Plans (Tables)
|
12 Months Ended |
Dec. 31, 2023 |
|---|
| Notes Tables |
|
| Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
| |
|
2023
|
|
|
2022
|
|
|
Expected Volatility
|
|
|
95 |
% |
|
|
95 |
% |
|
Risk–free interest rate
|
|
|
4.18 |
% |
|
|
2.89 |
% |
|
Dividend yield
|
|
|
- |
% |
|
|
- |
% |
|
Expected life of options (in years)
|
|
|
5.35 |
|
|
|
6.08 |
|
|
| 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, 2022
|
|
|
124,000 |
|
|
$ |
97.95 |
|
|
|
|
|
|
$ |
4,000 |
|
|
Granted
|
|
|
388,000 |
|
|
$ |
9.78 |
|
|
|
|
|
|
|
- |
|
|
Exercised
|
|
|
- |
|
|
$
|
- |
|
|
|
|
|
|
|
|
|
|
Canceled / forfeited
|
|
|
(116,000 |
)
|
|
$ |
83.89 |
|
|
|
|
|
|
|
|
|
|
Outstanding at December 31, 2023
|
|
|
396,000 |
|
|
$ |
15.70 |
|
|
|
8.97 |
|
|
$ |
- |
|
|
Vested and exercisable at December 31, 2023
|
|
|
163,000 |
|
|
$ |
24.17 |
|
|
|
8.46 |
|
|
$ |
- |
|
|
| Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] |
| |
|
2014 Plan Activity
|
|
|
Outside of the 2014 Plan
Activity
|
|
|
Totals
|
|
| |
|
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, 2022
|
|
|
101,000 |
|
|
$ |
35.64 |
|
|
|
1,000 |
|
|
$ |
18.19 |
|
|
|
102,000 |
|
|
$ |
35.34 |
|
|
Granted
|
|
|
177,000 |
|
|
$ |
9.25 |
|
|
|
143,000 |
|
|
$ |
5.97 |
|
|
|
320,000 |
|
|
$ |
7.78 |
|
|
Vested
|
|
|
(21,000 |
)
|
|
$ |
30.94 |
|
|
|
(54,000 |
)
|
|
$ |
3.80 |
|
|
|
(75,000 |
)
|
|
$ |
11.39 |
|
|
Canceled
|
|
|
(71,000 |
)
|
|
$ |
35.95 |
|
|
|
- |
|
|
$ |
- |
|
|
|
(71,000 |
)
|
|
$ |
35.95 |
|
|
At December 31, 2023
|
|
|
186,000 |
|
|
$ |
10.87 |
|
|
|
90,000 |
|
|
$ |
7.50 |
|
|
|
276,000 |
|
|
$ |
9.76 |
|
|
| 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, 2022
|
|
|
58,000 |
|
|
$ |
121.80 |
|
|
|
- |
|
|
$ |
- |
|
|
Granted
|
|
|
- |
|
|
$ |
- |
|
|
|
- |
|
|
$ |
- |
|
|
Expired
|
|
|
(27,000 |
)
|
|
$ |
204.39 |
|
|
|
- |
|
|
$ |
- |
|
|
Outstanding at December 31, 2023
|
|
|
31,000 |
|
|
$ |
49.21 |
|
|
|
3.70 |
|
|
$ |
- |
|
|
Vested and exercisable as of December 31, 2023
|
|
|
31,000 |
|
|
$ |
49.21 |
|
|
|
3.70 |
|
|
$ |
- |
|
|
| Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] |
| |
|
2023
|
|
|
2022
|
|
|
Stock options
|
|
$ |
1,014,000 |
|
|
$ |
1,278,000 |
|
|
Warrants
|
|
|
228,000 |
|
|
|
20,000 |
|
|
Restricted stock units
|
|
|
1,493,000 |
|
|
|
2,965,000 |
|
|
Total noncash stock compensation expense
|
|
$ |
2,735,000 |
|
|
$ |
4,263,000 |
|
| |
|
2023
|
|
|
2022
|
|
|
Sales, marketing and advertising
|
|
$ |
879,000 |
|
|
$ |
1,079,000 |
|
|
Engineering, technology and development
|
|
|
219,000 |
|
|
|
389,000 |
|
|
General and administrative
|
|
|
1,637,000 |
|
|
|
2,795,000 |
|
|
Total noncash stock compensation expense
|
|
$ |
2,735,000 |
|
|
$ |
4,263,000 |
|
|