6. FAIR VALUE OFFINANCIAL INSTRUMENTS (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Cash equivalents:
U.S. Treasury bills		$ 7,200,000fil_USTreasuryBills
Money market mutual funds	1,959,000fil_MoneyMarketMutualFunds	1,206,000fil_MoneyMarketMutualFunds
Time deposits	2,000,000fil_TimeDeposits1	55,000fil_TimeDeposits1
Marketable securities:
Marketable equity securities	909,000fil_MarketableEquitySecurities	1,098,000fil_MarketableEquitySecurities
Corporate debt securities	10,599,000fil_CorporateDebtSecurities	10,692,000fil_CorporateDebtSecurities
Total assets	15,467,000fil_TotalAssets	20,251,000fil_TotalAssets
Quoted Prices in Active Markets for Identical Assets (Level 1)
Cash equivalents:
U.S. Treasury bills		7,200,000
Money market mutual funds	1,959,000	1,206,000
Time deposits	2,000,000
Marketable securities:
Marketable equity securities
Corporate debt securities	10,599,000	10,692,000
Total assets	14,558,000	19,098,000
Significant Other Observable Inputs (Level 2)
Cash equivalents:
U.S. Treasury bills
Money market mutual funds
Time deposits		55,000
Marketable securities:
Marketable equity securities	909,000	1,098,000
Corporate debt securities
Total assets	909,000	1,153,000
Significant Unobservable Inputs (Level 3)
Cash equivalents:
Money market mutual funds
Time deposits
Marketable securities:
Marketable equity securities
Corporate debt securities
Total assets

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Amount of investments in debt securities classified as trading.

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For an unclassified balance sheet, this item represents investments in common and preferred stocks and other forms of securities that provide ownership interests in a corporation.

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Amount of short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Amount of deposits that cannot be withdrawn before a set date without penalty or for which notice of withdrawal is required. Time deposits include, but are not limited to, certificates of deposits, individual retirement accounts and open accounts.

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Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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