​

  ​ ​ ​

March 31, 

  ​ ​ ​

December 31, 

​

  ​ ​ ​

2026

  ​ ​ ​

2025

​

  ​ ​ ​

(in thousands)

Contractor advances

​

$

161

​

$

28

Prepaid insurance

​

​

437

​

​

730

Interest receivable

​

13

​

6

Other current assets

​

118

​

103

Total

​

$

729

​

$

867