June 30, 2021

Amortized Cost

Gross Unrealized
‎Gains

Gross Unrealized
‎Losses

Fair Value

Cash Equivalents

Short-Term
‎Investments

Long-Term
‎Investments

Cash equivalents:

Money Market funds

$

11,564,000 

$

—

$

—

$

11,564,000 

$

11,564,000 

$

—

$

—

Subtotal

11,564,000 

—

—

11,564,000 

11,564,000 

—

—

Investments:

Corporate Notes/Bonds

6,228,000 

2,000 

(2,000)

6,228,000 

—

1,705,000 

4,523,000 

Convertible Debt

374,000 

—

—

374,000 

—

—

374,000 

Subtotal

6,602,000 

2,000 

(2,000)

6,602,000 

—

1,705,000 

4,897,000 

Total

$

18,166,000 

$

2,000 

$

(2,000)

$

18,166,000 

$

11,564,000 

$

1,705,000 

$

4,897,000 

December 31, 2020

Amortized Cost

Gross Unrealized
‎Gains

Gross Unrealized
‎Losses

Fair Value

Cash Equivalents

Short-Term
‎Investments

Long-Term
‎Investments

Cash equivalents:

Money Market funds

$

9,424,000 

$

—

$

—

$

9,424,000 

$

9,424,000 

$

—

$

—

Subtotal

9,424,000 

—

—

9,424,000 

9,424,000 

—

—

Investments:

Commercial Paper

700,000 

—

—

700,000 

—

700,000 

—

Corporate Notes/Bonds

7,658,000 

7,000 

(1,000)

7,664,000 

—

2,059,000 

5,605,000 

Convertible Debt

605,000 

—

—

605,000 

—

—

605,000 

Subtotal

8,963,000 

7,000 

(1,000)

8,969,000 

—

2,759,000 

6,210,000 

Total

$

18,387,000 

$

7,000 

$

(1,000)

$

18,393,000 

$

9,424,000 

$

2,759,000 

$

6,210,000