Note 6 (Detail) (USD $)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Mar. 05, 2012
Line of Credit Facility, Maximum Borrowing Capacity				$ 12,000,000
Debt Instrument, Basis Spread on Variable Rate (in Basis Points)				3.75%
Year End Minimum Earnings Covenant		300,000	300,000
Capital Expenditure Limit Covenant	$ 400,000	$ 400,000	$ 400,000