​

​

Three Months Ended June 30,

​

2025

​

2024

​

Due from 

Due to

Due from 

Due to 

​

​

Qualstar

​

Qualstar

​

Qualstar

​

Qualstar

​

(in thousands)

Balance at April 1,

​

$

11

​

$

61

​

$

13

​

$

25

Billed (or accrued) to Qualstar by Interlink

​

​

133

​

​

—

​

​

104

​

​

—

Paid by Qualstar to Interlink

​

​

(127)

​

​

—

​

​

(101)

​

​

—

Billed (or accrued) to Interlink by Qualstar

​

​

—

​

​

44

​

​

—

​

​

37

Paid by Interlink to Qualstar

​

​

—

​

​

(87)

​

​

—

​

​

(51)

Balance at June 30,

​

$

17

​

$

18

​

$

16

​

$

11

​

​

Six Months Ended June 30,

​

2025

​

2024

​

Due from 

Due to

Due from

Due to

​

​

Qualstar

​

Qualstar

​

Qualstar

​

Qualstar

​

(in thousands)

Balance at January 1,

​

$

8

​

$

12

​

$

1

​

$

32

Billed (or accrued) to Qualstar by Interlink

​

​

253

​

​

—

​

​

180

​

​

—

Paid by Qualstar to Interlink

​

​

(244)

​

​

—

​

​

(165)

​

​

—

Billed (or accrued) to Interlink by Qualstar

​

​

—

​

​

93

​

​

—

​

​

73

Paid by Interlink to Qualstar

​

​

—

​

​

(87)

​

​

—

​

​

(94)

Balance at June 30,

​

$

17

​

$

18

​

$

16

​

$

11

​

​

Three Months Ended June 30,

​

​

2025

​

2024

​

Due from 

Due to

Due from 

Due to 

​

​

BKF Capital

​

BKF Capital

​

BKF Capital

​

BKF Capital

​

​

(in thousands)

Balance at April 1,

​

$

—

​

$

—

​

$

1

​

$

—

Billed (or accrued) to BKF Capital by Interlink

​

​

2

​

​

—

​

​

2

​

​

—

Paid by BKF Capital to Interlink

​

​

(2)

​

​

—

​

​

(2)

​

​

—

Billed (or accrued) to Interlink by BKF Capital

​

​

—

​

​

—

​

​

—

​

​

19

Paid by Interlink to BKF Capital

​

​

—

​

​

—

​

​

—

​

​

(19)

Balance at June 30,

​

$

—

​

$

—

​

$

1

​

$

—

​

​

Six Months Ended June 30,

​

​

2025

​

2024

​

Due from 

Due to

Due from

Due to

​

​

BKF Capital

​

BKF Capital

​

BKF Capital

​

BKF Capital

​

​

(in thousands)

Balance at January 1,

​

$

—

​

$

—

​

$

2

​

$

—

Billed (or accrued) to BKF Capital by Interlink

​

​

4

​

​

—

​

​

4

​

​

—

Paid by BKF Capital to Interlink

​

​

(4)

​

​

—

​

​

(5)

​

​

—

Billed (or accrued) to Interlink by BKF Capital

​

​

—

​

​

—

​

​

—

​

​

75

Paid by Interlink to BKF Capital

​

​

—

​

​

—

​

​

—

​

​

(75)

Balance at June 30,

​

$

—

​

$

—

​

$

1

​

$

—