Note 10 - Pension and Other Postretirement Benefits (Details) - Fair Value Hierarchy of Plan Assets (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash and Cash Equivalents [Member] | U.S. Plan [Member] | Fair Value, Inputs, Level 1 [Member]
Note 10 - Pension and Other Postretirement Benefits (Details) - Fair Value Hierarchy of Plan Assets [Line Items]
Fair Value of Plan Assets	$ 169,927
Cash and Cash Equivalents [Member] | Canadian Plan [Member] | Fair Value, Inputs, Level 1 [Member]
Note 10 - Pension and Other Postretirement Benefits (Details) - Fair Value Hierarchy of Plan Assets [Line Items]
Fair Value of Plan Assets	13,788
Mutual Funds [Member] | U.S. Plan [Member] | Fair Value, Inputs, Level 1 [Member]
Note 10 - Pension and Other Postretirement Benefits (Details) - Fair Value Hierarchy of Plan Assets [Line Items]
Fair Value of Plan Assets	220,841
Mutual Funds [Member] | Canadian Plan [Member] | Fair Value, Inputs, Level 1 [Member]
Note 10 - Pension and Other Postretirement Benefits (Details) - Fair Value Hierarchy of Plan Assets [Line Items]
Fair Value of Plan Assets	1,253,936
Corporate Or Government Bonds [Member] | U.S. Plan [Member] | Fair Value, Inputs, Level 1 [Member]
Note 10 - Pension and Other Postretirement Benefits (Details) - Fair Value Hierarchy of Plan Assets [Line Items]
Fair Value of Plan Assets	657,373
Equities [Member] | U.S. Plan [Member] | Fair Value, Inputs, Level 1 [Member]
Note 10 - Pension and Other Postretirement Benefits (Details) - Fair Value Hierarchy of Plan Assets [Line Items]
Fair Value of Plan Assets	1,100,563
U.S. Plan [Member]
Note 10 - Pension and Other Postretirement Benefits (Details) - Fair Value Hierarchy of Plan Assets [Line Items]
Fair Value of Plan Assets	2,148,704	2,248,925	2,067,871
Canadian Plan [Member]
Note 10 - Pension and Other Postretirement Benefits (Details) - Fair Value Hierarchy of Plan Assets [Line Items]
Fair Value of Plan Assets	$ 1,267,724	$ 1,287,679	$ 1,212,167