Note 12 - Pension and Other Postretirement Benefit Plans (Detail) - The following benefit payments under the Postretirement Plan, which reflect expected future service, are expected to be paid: (Postretirement Plans [Member], USD $)	Dec. 31, 2012
Postretirement Plans [Member]
2013	$ 161,000
2014	162,000
2015	184,000
2016	201,000
2017	221,000
2018 - 2022	$ 1,306,000

Note 12 - Pension and Other Postretirement Benefit Plans (Detail) - The following benefit payments under the Postretirement Plan, which reflect expected future service, are expected to be paid: (Postretirement Plans [Member], USD $)

Dec. 31, 2012

Postretirement Plans [Member]

$ 161,000

162,000

184,000

201,000

221,000

$ 1,306,000