​

​

Three Months Ended June 30, 

​

2026

​

2025

​

  ​ ​ ​

Due from 

  ​ ​ ​

Due to

  ​ ​ ​

Due from 

  ​ ​ ​

Due to 

​

​

Qualstar

​

Qualstar

​

Qualstar

​

Qualstar

​

(in thousands)

Balance at April 1

​

$

55

​

$

39

​

$

11

​

$

61

Billed (or accrued) to Qualstar by Interlink

​

​

89

​

​

—

​

​

133

​

​

—

Paid by Qualstar to Interlink

​

​

(137)

​

​

—

​

​

(127)

​

​

—

Billed (or accrued) to Interlink by Qualstar

​

​

—

​

​

44

​

​

—

​

​

44

Paid by Interlink to Qualstar

​

​

—

​

​

(53)

​

​

—

​

​

(87)

Balance at June 30

​

$

7

​

$

30

​

$

17

​

$

18

​

​

Six Months Ended June 30, 

​

2026

​

2025

​

  ​ ​ ​

Due from 

  ​ ​ ​

Due to

  ​ ​ ​

Due from

  ​ ​ ​

Due to

​

​

Qualstar

​

Qualstar

​

Qualstar

​

Qualstar

​

(in thousands)

Balance at January 1

​

$

5

​

$

25

​

$

8

​

$

12

Billed (or accrued) to Qualstar by Interlink

​

​

157

​

​

—

​

​

253

​

​

—

Paid by Qualstar to Interlink

​

​

(155)

​

​

—

​

​

(244)

​

​

—

Billed (or accrued) to Interlink by Qualstar

​

​

—

​

​

82

​

​

—

​

​

93

Paid by Interlink to Qualstar

​

​

—

​

​

(77)

​

​

—

​

​

(87)

Balance at June 30

​

$

7

​

$

30

​

$

17

​

$

18