Long-Term Debt and Line of Credit (Parenthetical) (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Schedule Of Capitalization Longterm Debt Line Of Credit [Line Items]
Long-term debt, net of current portion	$ 3,113,000	$ 3,337,000
Ten Year Term With Merrill Lynch One
Schedule Of Capitalization Longterm Debt Line Of Credit [Line Items]
Long-term debt, net of current portion	3,000,000	3,000,000
Debt instrument, maturity date	Dec. 31, 2017	Dec. 31, 2017
Debt instrument variable interest rate	ten-year term loan , with Merrill Lynch at LIBOR plus 1.3%, approximately 1.51
Ten Year Term With Merrill Lynch Two
Schedule Of Capitalization Longterm Debt Line Of Credit [Line Items]
Long-term debt, net of current portion	1,500,000	1,500,000
Debt instrument, maturity date	Dec. 31, 2017	Dec. 31, 2017
Debt instrument variable interest rate	ten-year term loan , with Merrill Lynch at LIBOR plus 1.3%, approximately 1.51
Three Year Term Bank Of America
Schedule Of Capitalization Longterm Debt Line Of Credit [Line Items]
Long-term debt, net of current portion	$ 2,600,000	$ 2,600,000
Debt instrument, maturity date	Aug. 31, 2012	Aug. 31, 2012
Debt instrument variable interest rate	three-year term loan , with Bank of America at LIBOR plus 2