As of December 31,

2023

2022

Furniture, fixtures, computer hardware and computer software

$

468,588

$

482,235

Leasehold improvements

15,995

87,957

Manufacturing machinery and equipment

20,661,222

21,739,504

Manufacturing machinery and equipment, in progress

32,087

280,473

Depreciable property, plant and equipment

21,177,892

22,590,169

Less: Accumulated depreciation and amortization

(20,131,008

)

(22,038,508

)

Net property, plant and equipment

$

1,046,884

$

551,661