6. FAIR VALUE OF FINANCIAL INSTRUMENTS (Detail) - (Table 2) Fair Value Measurements (USD $)	Jun. 30, 2013	Dec. 31, 2012
Estimate Of Fair Value, Fair Value Disclosure
Other investments by investment focus:
Other Investments	$ 3,409,000	$ 3,604,000
Fair Value, Inputs, Level 2
Other investments by investment focus:
Other Investments	2,160,000	2,351,000
Fair Value, Inputs, Level 3
Other investments by investment focus:
Other Investments	1,249,000	1,253,000
Total gain(losses) on Investment
Other investments by investment focus:
Other Investments		28,000
Technology & Communication | Estimate Of Fair Value, Fair Value Disclosure
Other investments by investment focus:
Other Investments	517,000	514,000
Technology & Communication | Fair Value, Inputs, Level 2
Other investments by investment focus:
Other Investments	517,000	514,000
Diversified businesses | Estimate Of Fair Value, Fair Value Disclosure
Other investments by investment focus:
Other Investments	1,143,000	1,337,000
Diversified businesses | Fair Value, Inputs, Level 2
Other investments by investment focus:
Other Investments	1,143,000	1,337,000
Real estate and related | Estimate Of Fair Value, Fair Value Disclosure
Other investments by investment focus:
Other Investments	1,449,000	1,453,000
Real estate and related | Fair Value, Inputs, Level 2
Other investments by investment focus:
Other Investments	500,000	500,000
Real estate and related | Fair Value, Inputs, Level 3
Other investments by investment focus:
Other Investments	949,000	953,000
Real estate and related | Total gain(losses) on Investment
Other investments by investment focus:
Other Investments		28,000
Other investments and related income | Estimate Of Fair Value, Fair Value Disclosure
Other investments by investment focus:
Other Investments	300,000	300,000
Other investments and related income | Fair Value, Inputs, Level 3
Other investments by investment focus:
Other Investments	$ 300,000	$ 300,000