4. Accrued Expenses (Tables)

12 Months Ended

Dec. 31, 2020

Payables and Accruals [Abstract]

Schedule of accrued expenses

	2020		2019
		(In thousands)
Accrued legal expenses - patent	$	2,284	$	6,181
Accrued consulting and other professional fees		–		470
Short-term lease liability		589		435
Other accrued liabilities		834		179
	$	3,707	$	7,265