Liabilities, other (Tables)

3 Months Ended

Mar. 31, 2021

Other Liabilities Disclosure [Abstract]

Summary of Liabilities, Other

Liabilities, other consist of the following:

	March 31, 2021		December 31, 2020
Deferred revenue, Parcel 20	$	225,000	$	199,000
Accrued professional fees		129,000		152,000
Deposits and prepaid rent		236,000		121,000
Accrued payroll and related costs		75,000		75,000
Other		47,000		16,000
	$	712,000	$	563,000