Note 11 - Equity (Details Textual)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
3 Months Ended |
6 Months Ended |
12 Months Ended |
|
|
|
|
|
Apr. 02, 2024
shares
|
Dec. 31, 2023
USD ($)
$ / shares
shares
|
Oct. 16, 2023
shares
|
Aug. 29, 2023
$ / shares
shares
|
Jul. 08, 2023
shares
|
May 01, 2023
$ / shares
shares
|
Mar. 15, 2023
USD ($)
shares
|
Feb. 23, 2023
$ / shares
shares
|
Feb. 16, 2023
USD ($)
$ / shares
shares
|
Nov. 23, 2022 |
Sep. 15, 2022
USD ($)
$ / shares
shares
|
Aug. 17, 2022
USD ($)
shares
|
Jul. 05, 2022
shares
|
Jun. 30, 2024
USD ($)
$ / shares
shares
|
Jun. 30, 2023
USD ($)
|
Jun. 30, 2024
USD ($)
$ / shares
shares
|
Jun. 30, 2023
USD ($)
|
Dec. 31, 2023
USD ($)
$ / shares
shares
|
Dec. 31, 2022
USD ($)
$ / shares
shares
|
Jun. 15, 2023
$ / shares
shares
|
Feb. 17, 2023
$ / shares
shares
|
Aug. 16, 2022
$ / shares
shares
|
Jul. 04, 2022
$ / shares
|
Dec. 31, 2021
$ / shares
|
Proceeds from Issuance or Sale of Equity | $ |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
$ 945,000
|
$ 1,225,000
|
$ 4,643,000
|
$ 290,000
|
|
|
|
|
|
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares |
|
$ 2.07
|
|
|
|
|
|
|
|
|
|
|
|
$ 2.19
|
|
$ 2.19
|
|
$ 2.07
|
$ 2.26
|
|
|
|
|
$ 7.5
|
Stock Repurchased and Retired During Period, Shares (in shares) |
|
|
4,217
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Shares Authorized (in shares) |
|
2,500,000,000
|
|
|
|
|
|
|
|
|
|
|
|
2,500,000,000
|
|
2,500,000,000
|
|
2,500,000,000
|
|
|
|
|
|
|
Common Stock, Shares Authorized (in shares) |
|
2,470,000,000
|
|
|
|
|
|
|
|
|
|
|
|
2,470,000,000
|
|
2,470,000,000
|
|
2,470,000,000
|
2,470,000,000
|
|
|
|
|
|
Preferred Stock, Shares Authorized (in shares) |
|
30,000,000
|
|
|
|
|
|
|
|
|
|
|
|
30,000,000
|
|
30,000,000
|
|
30,000,000
|
30,000,000
|
|
|
|
|
|
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Grant Date Fair Value | $ |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
$ 0
|
0
|
|
$ 692,000
|
|
|
|
|
|
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value | $ |
|
$ 0
|
|
|
|
|
|
|
|
|
|
|
|
$ 0
|
|
0
|
|
$ 0
|
$ 0
|
|
|
|
|
|
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount | $ |
|
434,000
|
|
|
|
|
|
|
|
|
|
|
|
317,000
|
|
$ 317,000
|
|
$ 434,000
|
|
|
|
|
|
|
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) |
106,000
|
|
|
|
3,148,288
|
|
|
|
|
|
|
|
|
|
|
0
|
|
795,916
|
|
|
|
|
|
|
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year) |
5 years
|
|
|
|
5 years
|
|
|
|
|
|
|
|
|
|
|
|
|
5 years
|
5 years
|
|
|
|
|
|
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Number of Shares (in shares) |
106,000
|
|
|
|
362,584
|
|
|
|
|
|
|
|
|
|
|
187,739
|
|
246,883
|
|
|
|
|
|
|
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) |
3 years
|
|
|
|
3 years
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Share-Based Payment Arrangement, Option [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Share-Based Payment Arrangement, Expense | $ |
|
|
|
|
|
|
|
|
|
|
|
|
|
$ 58,000
|
$ 74,000
|
$ 117,000
|
$ 148,000
|
$ 295,000
|
$ 60,000
|
|
|
|
|
|
Reverse Stock Split [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Stockholders' Equity Note, Stock Split, Conversion Ratio |
|
|
|
|
|
|
|
|
|
750
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Conversion of Series B Preferred Stock to Common Stock [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Preferred Stock, Mandatory Conversion Feature, Offering Proceeds Threshold | $ |
|
$ 1,000
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
$ 1,000
|
|
|
|
|
|
|
Preferred Stock, Convertible, Conversion Ratio |
|
1
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1
|
|
|
|
|
|
|
Conversion of Stock, Shares Converted (in shares) |
|
14,578,833
|
|
|
|
|
|
|
|
|
|
|
|
|
|
14,578,833
|
|
|
|
|
|
|
|
|
Preferred Stock, Mandatory Conversion Feature, Company Valuation | $ |
|
$ 18,000
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
$ 18,000
|
|
|
|
|
|
|
Related Party [Member] | Consulting Fees [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Shares Issued, Price Per Share (in dollars per share) | $ / shares |
|
|
|
|
|
$ 0.0041
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Stock Issued During Period, Shares, Issued for Services (in shares) |
|
|
|
|
|
284,964
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
August 2022 Securities Purchase Agreement Warrants [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) |
|
|
|
|
|
|
|
|
|
|
|
13,333
|
|
|
|
|
|
|
|
|
|
|
|
|
Series C Preferred Unit Warrants [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares) |
|
1
|
|
1
|
|
|
|
|
|
|
|
|
|
1
|
|
1
|
|
1
|
|
|
|
|
|
|
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares |
|
$ 2.56
|
|
$ 2.56
|
|
|
|
|
|
|
|
|
|
$ 2.56
|
|
$ 2.56
|
|
$ 2.56
|
|
|
|
|
|
|
Warrants and Rights Outstanding, Term (Year) |
|
3 years
|
|
|
|
|
|
|
|
|
|
|
|
3 years
|
|
3 years
|
|
3 years
|
|
|
|
|
|
|
Warrants or Rights Issued (in shares) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
836,531
|
|
759,863
|
|
|
|
|
|
|
Noncash Warrants Issued (in shares) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
781,250
|
|
|
|
|
|
|
Tranche A Warrants [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) |
|
526,749
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
526,749
|
|
|
|
|
|
|
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares |
|
$ 0.75
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
$ 0.75
|
|
|
|
|
$ 0.75
|
|
Class of Warrant or Right, Exercise Price, Purchase Price Numerator | $ |
|
$ 50,000
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
$ 50,000
|
|
|
|
|
|
|
Tranche B Warrants [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) |
|
262,051
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
262,051
|
|
|
|
|
|
|
Class of Warrant or Right, Exercise Price, Purchase Price Numerator | $ |
|
$ 150,000
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
$ 150,000
|
|
|
|
|
|
|
Convertible Debt and Stock Warrants [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
198,482
|
|
|
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
$ 3
|
|
|
WPC Warrants [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
123,333
|
|
|
|
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
$ 0.00473
|
|
|
|
Series A Warrants [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
6,048,456
|
|
|
|
|
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
$ 0.01
|
|
|
|
|
Warrants and Rights Outstanding, Term (Year) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
5 years
|
|
|
|
|
Series A Preferred Stock [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Stock Issued During Period, Shares, New Issues (in shares) |
|
|
|
|
|
|
|
|
|
|
|
|
3,198,421
|
|
|
|
|
|
|
|
|
|
|
|
Preferred Stock, Shares Authorized (in shares) |
|
|
|
|
|
|
|
|
|
|
|
|
|
30,000,000
|
|
30,000,000
|
|
|
|
|
|
|
|
|
Series B Preferred Stock [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Stock Issued During Period, Shares, New Issues (in shares) |
|
|
|
|
|
|
14,578,833
|
10,799,136
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Shares Issued, Price Per Share (in dollars per share) | $ / shares |
|
|
|
|
|
|
|
$ 0.1852
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Proceeds from Issuance of Preferred Stock and Preference Stock | $ |
|
|
|
|
|
|
$ 2,700,000
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Payments of Stock Issuance Costs | $ |
|
|
|
|
|
|
$ 92,000
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Preferred Stock, Shares Authorized (in shares) |
|
30,000,000
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
30,000,000
|
30,000,000
|
|
|
|
|
|
Series C Preferred Stock [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Proceeds from Issuance or Sale of Equity | $ |
|
$ 1,969,000
|
|
|
|
|
|
|
|
|
|
|
|
|
|
$ 1,070,000
|
|
|
|
|
|
|
|
|
Payments of Stock Issuance Costs | $ |
|
$ 67,000
|
|
|
|
|
|
|
|
|
|
|
|
|
|
$ 125,000
|
|
|
|
|
|
|
|
|
Units Issued During Period, New Issues (in shares) |
|
1,538,134
|
|
7,812,500
|
|
|
|
|
|
|
|
|
|
|
|
836,085
|
|
|
|
|
|
|
|
|
Preferred Stock, Mandatory Conversion Feature, Offering Proceeds Threshold | $ |
|
$ 2,000
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
$ 2,000
|
|
|
|
|
|
|
Preferred Stock, Shares Authorized (in shares) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Preferred Stock, Mandatory Conversion Feature, Company Valuation | $ |
|
$ 65,000
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
$ 65,000
|
|
|
|
|
|
|
Series C Preferred Stock [Member] | Series C Preferred Unit Warrants [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Class of Warrant or Right, Combined Purchase Price (in dollars per share) | $ / shares |
|
|
|
$ 1.28
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Securities Purchase Agreement [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Stock Issued During Period, Shares, New Issues (in shares) |
|
|
|
|
|
|
|
|
32,536,386
|
|
51,282
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Proceeds from Issuance or Sale of Equity | $ |
|
|
|
|
|
|
|
|
$ 133,000
|
|
$ 250,000
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Shares Issued, Price Per Share (in dollars per share) | $ / shares |
|
|
|
|
|
|
|
|
$ 0.0041
|
|
$ 4.87
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Securities Purchase Agreement [Member] | Series A Preferred Stock [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Stock Issued During Period, Shares, New Issues (in shares) |
|
|
|
|
|
|
|
|
|
|
|
10,000,000
|
|
|
|
|
|
|
|
|
|
|
|
|
Proceeds from Issuance or Sale of Equity | $ |
|
|
|
|
|
|
|
|
|
|
|
$ 40,000
|
|
|
|
|
|
|
|
|
|
|
|
|