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Note 12 - Warrants and Options
 3 Months Ended
Mar. 31, 2020
Notes to Financial Statements  
Share-based Payment Arrangement [Text Block]
NOTE
12.
WARRANTS AND OPTIONS
 
Options
 
At
March 31, 2020 
and
December 31, 2019,
we had fully vested options outstanding to purchase
314,218
 
shares of common stock at exercise prices ranging from
$3.27
 to
$
134.00
per share.
 
Due to the high level of volatility in the stock price of our common stock, our management determined the grant date fair value of the options using the then quoted stock price at the grant date.
 
Warrants
 
At
March 31, 2020 
and
December 31, 2019,
we had warrants outstanding to purchase
728,583
shares of common stock. At
March 31, 2020 
the warrants had a weighted average exercise price of
$6.18
 
per share purchased and a weighted average remaining contractual term of
2.75
 years. At
December 31, 2020,
the warrants had a weighted average exercise price of
$6.18
 per share purchased and a weighted average remaining contractual term of
3.00
years. 
 
Non-Incentive Plan Options
 
At
March 31, 2020 
and
December 31, 2019,
we had
323,498
non-incentive options outstanding with a weighted-average exercise price of
$21.84
.
The non-incentive options have a remaining contract term of
.67
 years and
.92
years at
March 31, 2020
and
December 31, 2019,
respectively. These options were out of the money at
March 31, 2020 
and
December 31, 2019 
and had
no
intrinsic value.