8. Subordinated Convertible Debentures Payable (Tables)

12 Months Ended

Dec. 31, 2017

Convertible Subordinated Debt [Abstract]

Subordinated debentures payable

	2017		2016
	($ in thousands)
6.5%, due June, 1991	$	447	$	447
6%, due May, 1992		8,025		8,025
	$	8,472	$	8,472

Subordinated convertible debenture

	2017		2016
	($ in thousands)
Original face value	$	1,034	$	1,034
Outstanding debenture principal balance		447		447
Accrued and unpaid interest balance		846		817
Debenture reserve account balance		41		41