Note 2 - Liquidity and Going Concern Assessment (Details Textual) kr / shares in Units, $ / shares in Units, kr in Thousands, $ in Thousands | | | | | | 1 Months Ended | 2 Months Ended | 3 Months Ended | 6 Months Ended | | | | | | | |
Feb. 05, 2024 DKK (kr) shares | Feb. 01, 2024 DKK (kr) shares | Jan. 26, 2024 DKK (kr) shares | Dec. 18, 2023 USD ($) $ / shares shares | Jun. 07, 2022 USD ($) | Feb. 29, 2024 $ / shares shares | Feb. 29, 2024 USD ($) $ / shares shares | Mar. 31, 2022 USD ($) | Jun. 30, 2024 USD ($) shares | Jun. 21, 2024 kr / shares | Jun. 20, 2024 $ / shares | May 23, 2024 kr / shares | May 22, 2024 $ / shares | Jul. 31, 2023 USD ($) | Oct. 03, 2022 USD ($) | Jul. 07, 2022 shares |
Statement Line Items [Line Items] | | | | | | | | | | | | | | | | |
Issue of equity | $ | | | | | | | | $ 5,973 | $ 14,182 | | | | | | | |
The 2023 SPA investors [member] | | | | | | | | | | | | | | | | |
Statement Line Items [Line Items] | | | | | | | | | | | | | | | | |
Proceeds from issuing shares and warrants | $ | | | | $ 5,300 | | | | | | | | | | | | |
Potential proceeds from issuing shares and warrants in the event of cash exercise | $ | | | | $ 6,800 | | | | | | | | | | | | |
Ordinary shares [member] | | | | | | | | | | | | | | | | |
Statement Line Items [Line Items] | | | | | | | | | | | | | | | | |
Issue of equity | kr | kr 3,125 | kr 4,450 | kr 2,634 | | | | | | | | | | | | | |
Increase (decrease) in number of shares outstanding (in shares) | 3,125,000 | 4,450,000 | 2,633,550 | | | | | | | | | | | | | |
Ordinary shares [member] | The 2023 SPA investors [member] | | | | | | | | | | | | | | | | |
Statement Line Items [Line Items] | | | | | | | | | | | | | | | | |
Increase (decrease) in number of shares outstanding (in shares) | | | | 9,726,898 | | | | | | | | | | | | |
The 2023 SPA investor warrants [member] | | | | | | | | | | | | | | | | |
Statement Line Items [Line Items] | | | | | | | | | | | | | | | | |
Class of warrant, exercise price of warrants (in dollars per share) | (per share) | | | | | | | | | | kr 4.799 | $ 0.707 | | | | | |
Class of warrants exercise price of warrants per ADS (in dollars per share) | (per share) | | | | | | | | | | kr 47.99 | $ 7.07 | | | | | |
The 2023 SPA investor warrants [member] | The 2023 SPA investors [member] | | | | | | | | | | | | | | | | |
Statement Line Items [Line Items] | | | | | | | | | | | | | | | | |
Class of warrants exercisable for shares (in shares) | | | | 9,726,898 | | | | | | | | | | | | |
Class of warrants, offering price per warrant (in dollars per share) | $ / shares | | | | $ 0.54 | | | | | | | | | | | | |
Class of warrant, exercise price of warrants (in dollars per share) | $ / shares | | | | $ 0.71 | | | | | | | | | | | | |
The 2024 investor warrants [member] | | | | | | | | | | | | | | | | |
Statement Line Items [Line Items] | | | | | | | | | | | | | | | | |
Class of warrants exercise price of warrants per ADS (in dollars per share) | (per share) | | | | | | | | | | | | kr 27.52 | $ 4 | | | |
Lincoln Park agreement [member] | | | | | | | | | | | | | | | | |
Statement Line Items [Line Items] | | | | | | | | | | | | | | | | |
Purchase agreement, maximum aggregate amount | $ | | | | | $ 40,000 | | | | | | | | | | | |
Issue of equity | $ | | | | | $ 1,200 | | | | | | | | | | | |
Number of shares authorised (in shares) | | | | | | | | | | | | | | | | 4,649,250 |
Lincoln Park agreement [member] | Commitment shares [member] | | | | | | | | | | | | | | | | |
Statement Line Items [Line Items] | | | | | | | | | | | | | | | | |
Number of shares authorised (in shares) | | | | | | | | | | | | | | | | 428,572 |
Lincoln Park agreement [member] | Ordinary shares [member] | | | | | | | | | | | | | | | | |
Statement Line Items [Line Items] | | | | | | | | | | | | | | | | |
Number of shares authorised (in shares) | | | | | | | | | | | | | | | | 4,220,678 |
At the market agreement [member] | | | | | | | | | | | | | | | | |
Statement Line Items [Line Items] | | | | | | | | | | | | | | | | |
Purchase agreement, maximum aggregate amount | $ | | | | | | | | | | | | | | | $ 14,400 | |
Purchase agreement, commission percentage | | | | | | | | | | | | | | | 3% | |
Global Growth Holding Limited [member] | | | | | | | | | | | | | | | | |
Statement Line Items [Line Items] | | | | | | | | | | | | | | | | |
Purchase agreement, maximum aggregate amount | $ | | | | | | | | | | | | | | $ 20,000 | | |
Purchase agreement, maximum required single purchase amount | $ | | | | | | | | | | | | | | 700 | | |
Purchase agreement, commitment fee | $ | | | | | | | | | | | | | | $ 1,100 | | |
February 2024 offering [member] | | | | | | | | | | | | | | | | |
Statement Line Items [Line Items] | | | | | | | | | | | | | | | | |
Proceeds from issuing shares and warrants | $ | | | | | | | $ 8,400 | | | | | | | | | |
February 2024 offering [member] | Ordinary shares [member] | | | | | | | | | | | | | | | | |
Statement Line Items [Line Items] | | | | | | | | | | | | | | | | |
Increase (decrease) in number of shares outstanding (in shares) | | | | | | 7,575,000 | 7,575,000 | | | | | | | | | |
February 2024 offering [member] | American depository share [member] | | | | | | | | | | | | | | | | |
Statement Line Items [Line Items] | | | | | | | | | | | | | | | | |
Increase (decrease) in number of shares outstanding (in shares) | | | | | | 757,500 | 757,500 | | | | | | | | | |
February 2024 offering [member] | The 2024 investor warrants [member] | | | | | | | | | | | | | | | | |
Statement Line Items [Line Items] | | | | | | | | | | | | | | | | |
Class of warrants exercisable for shares (in shares) | | | | | | 7,575,000 | 7,575,000 | | | | | | | | | |
Class of warrants, offering price per warrant (in dollars per share) | $ / shares | | | | | | $ 4 | $ 4 | | | | | | | | | |
Class of warrants exercisable for ADS (in shares) | | | | | | 757,500 | 757,500 | | | | | | | | | |
Class of warrants exercise price of warrants per ADS (in dollars per share) | $ / shares | | | | | | $ 27.52 | $ 27.52 | | | | | | | | | |
Class of prefunded warrants exercisable for ADS (in shares) | | | | | | 2,992,500 | 2,992,500 | | | | | | | | | |
Class of prefunded warrants exercisable for shares (in shares) | | | | | | 29,925,000 | 29,925,000 | | | | | | | | | |
Class of prefunded warrants, offering price per warrant (in dollars per share) | $ / shares | | | | | | $ 4 | $ 4 | | | | | | | | | |
Class of prefunded warrant, exercise price of warrants per ADS (in dollars per share) | $ / shares | | | | | | $ 1.4537 | $ 1.4537 | | | | | | | | | |
Class of prefunded warrants to purchase ADS, exercises (in shares) | | | | | | | | | 599,500 | | | | | | | |
Proceeds from issuance of prefunded warrants | $ | | | | | | | | | $ 900 | | | | | | | |