Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($)	Mar. 31, 2021	Dec. 31, 2020
CURRENT ASSETS
Cash	$ 458,000	$ 869,000
Accounts receivable, net	1,493,000	1,362,000
Prepaid expenses and other assets	138,000	80,000
Assets held for sale	7,336,000	7,440,000
Total current assets	9,425,000	9,751,000
PROPERTY	51,988,000	51,956,000
Accumulated depreciation	(33,745,000)	(33,445,000)
Property, net	18,243,000	18,511,000
OTHER ASSETS
Deferred development costs	8,943,000	8,901,000
Other noncurrent assets	1,287,000	1,307,000
Total other assets	10,230,000	10,208,000
TOTAL ASSETS	37,898,000	38,470,000
CURRENT LIABILITIES
Accounts payable	985,000	899,000
Payroll and employee benefits	451,000	970,000
Long-term debt, current portion	800,000	200,000
Accrued retirement benefits, currernt portion	165,000	165,000
Deferred revenue, current portion	472,000	260,000
Other current liabilities	508,000	453,000
Total current liabilities	3,381,000	2,947,000
LONG-TERM LIABILITIES
Accrued retirement benefits	10,232,000	10,926,000
Other noncurrent liabilities	75,000	83,000
Total long-term liabilities	14,676,000	15,456,000
COMMITMENTS AND CONTINGENCIES
STOCKHOLDERS' EQUITY
Common stock--no par value, 43,000,000 shares authorized, 19,351,489 and 19,311,528 shares issued and outstanding	81,972,000	81,485,000
Additional paid-in-capital	9,184,000	9,184,000
Accumulated deficit	(49,838,000)	(48,904,000)
Accumulated other comprehensive loss	(21,477,000)	(21,698,000)
Total stockholders' equity	19,841,000	20,067,000
TOTAL LIABILITIES & STOCKHOLDERS' EQUITY	37,898,000	38,470,000
License [Member]
LONG-TERM LIABILITIES
Deferred revenue	1,733,000	1,767,000
Member Deposits [Member]
LONG-TERM LIABILITIES
Deferred revenue	$ 2,636,000	$ 2,680,000