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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands | Preferred Stock [Member] Series B [Member] | Preferred Stock [Member] Series C [Member] | Preferred Stock [Member] Series D [Member] | Preferred Stock [Member] Series E [Member] | Common Stock [Member] | Common Stock [Member] Series C [Member] | Common Stock [Member] Series D [Member] | Additional Paid-in Capital [Member] | Additional Paid-in Capital [Member] Series C [Member] | Additional Paid-in Capital [Member] Series D [Member] | Additional Paid-in Capital [Member] Series E [Member] | Accumulated Deficit [Member] | Accumulated Deficit [Member] Series C [Member] | Accumulated Deficit [Member] Series D [Member] | Accumulated Deficit [Member] Series E [Member] | Total | Series C [Member] | Series D [Member] | Series E [Member]
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Balance at Dec. 31, 2021 | $ 5 | $ 0 | $ 0 | $ 0 | $ 0 |  |  | $ 48,079 |  |  |  | $ 65 |  |  |  | $ 48,149 |  |  |
Balance (in shares) at Dec. 31, 2021 | 500,000 | 10,000 | 0 | 0 | 44,101 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net loss | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 |  |  | 0 |  |  |  | (326) |  |  |  | (326) |  |  |
Issuance of 15,571,429 units (comprising from common stock or prefunded warrants and warrants) and 628,751 warrants at primary offering, net of issuance costs (Note 7(a)) |  |  |  |  | $ 1 |  |  | 10,694 |  |  |  | 0 |  |  |  | 10,695 |  |  |
Issuance of 15,571,429 units (comprising from common stock or prefunded warrants and warrants) and 628,751 warrants at primary offering, net of issuance costs (Note 7(a)) (in shares) |  |  |  |  | 65,357 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of 6,407 shares of common stock upon exercise of underwriters' over-allotment option and exercise of 2,430,000 Class A warrants (Note 7(a)) |  |  |  |  | $ 0 |  |  | 898 |  |  |  | 0 |  |  |  | 898 |  |  |
Issuance of 6,407 shares of common stock upon exercise of underwriters' over-allotment option and exercise of 2,430,000 Class A warrants (Note 7(a)) (in shares) |  |  |  |  | 6,407 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of stock |  |  | $ 0 |  |  |  |  |  |  | $ 17,600 |  |  |  | $ 0 |  |  |  | $ 17,600 |
Issuance of stock (in shares) |  |  | 25,000 |  | 6,407 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock following exercise of warrants |  |  |  |  | $ 0 |  |  | 3,143 |  |  |  | 0 |  |  |  | 3,143 |  |  |
Issuance of common stock following exercise of warrants (in shares) |  |  |  |  | 33,280 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred Stock redemption and issuance of common stock |  |  | $ 0 |  |  |  | $ 4 |  |  | 130 |  |  |  | (134) |  |  |  | 0 |
Preferred Stock redemption and issuance of common stock (in shares) |  |  |  |  |  |  | 360,055 |  |  |  |  |  |  |  |  |  |  |  |
Preferred Stock redemption and issuance of common stock (in shares) |  |  | (15,828) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Compensation cost under the Equity Incentive Plan (Note 7(c)) |  | $ 0 |  |  |  | $ 0 |  |  | $ 568 |  |  |  | $ 0 |  |  |  | $ 568 |  |
Compensation cost under the Equity Incentive Plan (Note 7(c)) (in shares) |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends declared ($10 per share of common stock and Class A warrant) (Note 7(b)) |  |  |  |  | $ 0 |  |  | (1,767) |  |  |  | (448) |  |  |  | (2,215) |  |  |
Dividends declared and paid ($2 per share of common stock and Class A warrant) (Note 7(b)) |  |  |  |  | 0 |  |  | 0 |  |  |  | (886) |  |  |  | (886) |  |  |
Dividends declared and paid on Preferred Stock (Note 7(c)) |  | $ 0 | $ 0 |  |  |  |  |  |  | 0 |  |  | (475) | (117) |  |  | (950) | (117) |
Dividends declared and paid on Preferred Stock (Note 7(c)) |  |  |  |  |  |  |  |  | (475) |  |  |  |  |  |  |  |  |  |
Balance at Dec. 31, 2022 | $ 5 | $ 0 | $ 0 | $ 0 | $ 5 |  |  | 78,870 |  |  |  | (2,321) |  |  |  | 76,559 |  |  |
Balance (in shares) at Dec. 31, 2022 | 500,000 | 10,000 | 9,172 | 0 | 509,200 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net loss | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 |  |  | 0 |  |  |  | (1,977) |  |  |  | (1,977) |  |  |
Issuance of stock |  |  | $ 0 | $ 0 |  |  |  |  |  | 10,000 | $ 35 |  |  | 0 | $ 0 |  |  | 10,000 | $ 35
Issuance of stock (in shares) |  |  | 13,157 | 1,200 | 615,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock following exercise of warrants |  |  |  |  | $ 1 |  |  | 26 |  |  |  | 0 |  |  |  | 27 |  |  |
Issuance of common stock following exercise of warrants (in shares) |  |  |  |  | 135,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of 15,000,000 units (comprising from 615,000 shares of common stock, 2,700,000 prefunded warrants and 15,000,000 Class B warrants) at primary offering, net of issuance costs (the "February 2023 Registered Direct Offering") (Note 7(a)) |  |  |  |  | $ 6 |  |  | 6,693 |  |  |  | 0 |  |  |  | 6,699 |  |  |
Issuance of 15,000,000 units (comprising from 615,000 shares of common stock, 2,700,000 prefunded warrants and 15,000,000 Class B warrants) at primary offering, net of issuance costs (the "February 2023 Registered Direct Offering") (Note 7(a)) (in shares) |  |  |  |  | 615,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Retirement of fractional common shares in June reverse stock split (Note 7(a)) |  |  |  |  | $ 0 |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |
Retirement of fractional common shares in June reverse stock split (Note 7(a)) (in shares) |  |  |  |  | (65) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred Stock redemption and issuance of common stock |  | $ 0 | $ 0 |  | $ 20 | $ 36 |  | 134 | 2,513 |  |  | (154) | (2,549) |  |  | 0 | 0 |  |
Preferred Stock redemption and issuance of common stock (in shares) |  |  |  |  |  | 3,649,474 | 1,977,491 |  |  |  |  |  |  |  |  |  |  |  |
Preferred Stock redemption and issuance of common stock (in shares) |  | (9,793) | (8,591) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Compensation cost under the Equity Incentive Plan (Note 7(c)) |  | $ 0 |  |  |  | $ 0 |  |  | 1,893 |  |  |  | 0 |  |  |  | 1,893 |  |
Compensation cost under the Equity Incentive Plan (Note 7(c)) (in shares) |  | 5,314 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Alternative cashless exercise of private placement warrants (Note 7(b)) |  |  |  |  | $ 6 |  |  | 1,276 |  |  |  | 0 |  |  |  | 1,282 |  |  |
Alternative cashless exercise of private placement warrants (Note 7(b)) (in shares) |  |  |  |  | 562,501 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends declared and paid on Preferred Stock (Note 7(c)) |  | $ 0 | $ 0 |  |  |  |  |  |  |  |  |  | (306) | (713) |  |  | (991) | (968) |
Dividends declared and paid on Preferred Stock (Note 7(c)) |  |  |  |  |  |  |  |  | (685) | (255) |  |  |  |  |  |  |  |  |
Balance at Dec. 31, 2023 | $ 5 | $ 0 | $ 0 | $ 0 | $ 74 |  |  | 100,500 |  |  |  | (8,020) |  |  |  | 92,559 |  |  |
Balance (in shares) at Dec. 31, 2023 | 500,000 | 5,521 | 13,738 | 1,200 | 7,448,601 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net loss | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 |  |  | 0 |  |  |  | (17,862) |  |  |  | (17,862) |  |  |
Issuance of stock |  |  | $ 0 |  |  |  |  |  |  | 8,600 |  |  |  | 0 |  |  |  | 8,600 |
Issuance of stock (in shares) |  |  | 9,442 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred Stock redemption and issuance of common stock |  |  | $ 0 | $ 0 |  |  | $ 1 |  |  | 25 |  |  |  | (26) |  |  |  | $ 0 |
Preferred Stock redemption and issuance of common stock (in shares) |  |  |  |  | 56,381 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred Stock redemption and issuance of common stock (in shares) |  |  | (97) | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  | (97) |
Compensation cost under the Equity Incentive Plan (Note 7(c)) |  | $ 0 |  |  |  | $ 0 |  |  | 2,776 |  |  |  | 0 |  |  |  | 2,776 |  |
Compensation cost under the Equity Incentive Plan (Note 7(c)) (in shares) |  | 3,332 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends declared and paid on Preferred Stock (Note 7(c)) |  | $ 0 | $ 0 |  |  |  |  |  |  |  |  |  | $ 0 | $ 0 |  |  | $ (681) | $ (1,022) |
Dividends declared and paid on Preferred Stock (Note 7(c)) |  |  |  |  |  |  |  |  | $ (681) | $ (1,022) |  |  |  |  |  |  |  |  |
Balance at Dec. 31, 2024 | $ 5 | $ 0 | $ 0 | $ 0 | $ 75 |  |  | $ 110,198 |  |  |  | $ (25,908) |  |  |  | $ 84,370 |  |  |
Balance (in shares) at Dec. 31, 2024 | 500,000 | 8,853 | 23,083 | 1,200 | 7,504,982 |  |  |  |  |  |  |  |  |  |  |  |  |  |

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