Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2017

Significant Accounting Policies [Abstract]

Useful Lives of Property and Equipment

Estimated useful lives for property and equipment are as follows:

	Estimated Useful Lives
Laboratory equipment	5 – 10 years
Office and computer equipment	3 – 5 years
Leasehold improvements	Shorter of lease term or useful life

Annual Patent Amortization Expense

Annual patent amortization expense for the next five years and thereafter are estimated as follows:

	Patent
	Amortization
2018	$	31,000
2019		31,000
2020		31,000
2021		31,000
2022		31,000
Thereafter through December 2026		121,000
Total patent amortization expense	$	276,000