8. Subordinated Convertible Debentures Payable (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
6.5% Subordinated convertible debenture
Original face value	$ 1,034	$ 1,034
Outstanding debenture principal balance	138	138
Face value of debentures surrendered	0	22
Face value of debentures escheated	0	287
Accrued and unpaid interest balance	279	270
Debenture reserve account balance	13	13
Debenture reserve funds utilized in payment of final distribution	0	2
Debenture reserve funds utilized in escheatment to states of debenture holders	0	26
Forgiveness of debt	0	281
Forgiveness of interest	$ 0	$ 594