CONSOLIDATED BALANCE SHEETS - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Current assets:
Cash	$ 12,568,000	$ 7,577,000
Accounts receivable	601,000	645,000
Inventories	18,000	18,000
Prepaid expenses and other	1,557,000	1,186,000
Income taxes receivable	24,000	283,000
Assets held for sale	5,844,000
Total current assets	20,612,000	9,709,000
Property and equipment, net	63,075,000	71,357,000
Right of use asset	112,000	188,000
Deferred income taxes	2,425,000
Other assets	1,322,000	1,212,000
Total assets	87,546,000	82,466,000
Current liabilities:
Accounts payable	570,000	119,000
Accrued liabilities	3,463,000	3,710,000
Contract liabilities	1,395,000	976,000
Non-refundable deposit	500,000
Total current liabilities	5,928,000	4,805,000
Liability for pension benefits	871,000	1,016,000
Lease liability	33,000	112,000
Non-refundable deposit		500,000
Provision for contingent obligation	3,218,000	3,389,000
Deferred income taxes	8,469,000	8,676,000
Total liabilities	18,519,000	18,498,000
Commitments and contingencies (see Notes to the Consolidated Financial Statements)
Stockholders' equity:
Preferred stock, $0.10 par value; 1,000,000 shares authorized; shares issued and outstanding: none
Additional paid-in capital	101,207,000	100,994,000
Accumulated deficit	(32,032,000)	(36,968,000)
Accumulated other comprehensive loss	(3,785,000)	(3,691,000)
Total stockholders' equity	69,027,000	63,968,000
Total liabilities and stockholders' equity	87,546,000	82,466,000
Common Stock [Member]
Stockholders' equity:
Total stockholders' equity	1,786,000	1,782,000
Common Stock [Member] | Common Stock
Stockholders' equity:
Common stock	1,786,000	1,782,000
Common Stock [Member] | Common Class A [Member]
Stockholders' equity:
Common stock	1,851,000	1,851,000
Total stockholders' equity	$ 1,851,000	$ 1,851,000