4. Accrued Expenses (Details Narrative) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Payables and Accruals [Abstract]
Accrued litigation liabilities	$ 6,181	$ 3,803
Accrued consulting and other professional fees	470	0
Foreign taxes payable	0	374
State income taxes payable	27	0
Short-term lease liability	435	0
Other accrued liabilities	152	122
Total accrued expenses	$ 7,265	$ 4,299