Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2017

Accounting Policies [Abstract]

Property, Plant and Equipment

	Useful Lives in Years
Buildings	40
Manufacturing machinery and equipment	5 - 10
Furniture, fixtures, computer hardware/software	3 - 7
Leasehold improvements	life of lease

The following table summarizes property, plant and equipment as of December 31, 2017 and December 31, 2016:

	As of December 31,
	2017			2016
Building	$	5,828,960		$	5,828,960
Furniture, fixtures, computer hardware and computer software	489,421			489,421
Manufacturing machinery and equipment	30,327,481			30,321,079
Depreciable property, plant and equipment	36,645,862			36,639,460
Less: Accumulated depreciation and amortization	(32,013,686		)	(30,983,448		)
Net property, plant and equipment	$	4,632,176		$	5,656,012

Future Amortization of Patents

As of December 31, 2017, future amortization of patents is expected as follows:

2018	$	173,439
2019	$	153,717
2020	$	130,885
2021	$	85,760
2022	$	56,099
Thereafter	$	40,267
	$	640,167