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Long-term Debt (Detail) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Debt Instrument [Line Items]
Long-Term Debt, Gross	$ 3,338,000	$ 4,456,000
Less current portion	225,000	1,119,000
Long-term debt, net of current portion	3,113,000	3,337,000
Ten Year Term With Merrill Lynch One
Debt Instrument [Line Items]
Long-Term Debt, Gross	2,225,000	2,375,000
Long-term debt, net of current portion	3,000,000	3,000,000
Ten Year Term With Merrill Lynch Two
Debt Instrument [Line Items]
Long-Term Debt, Gross	1,113,000	1,188,000
Long-term debt, net of current portion	1,500,000	1,500,000
Three Year Term Bank Of America
Debt Instrument [Line Items]
Long-Term Debt, Gross	0	893,000
Long-term debt, net of current portion	$ 2,600,000	$ 2,600,000

Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date before deducting unamortized discount or premiums (if any). May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer.

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