Note 10 - Pension and Other Postretirement Benefits (Details) - Components of Net Periodic Employee Benefit Cost (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
U.S. Plan [Member]
Note 10 - Pension and Other Postretirement Benefits (Details) - Components of Net Periodic Employee Benefit Cost [Line Items]
Projected benefit obligation at beginning of year	$ 4,100,047	$ 3,829,727
Change in plan assets
Fair value of plan assets at beginning of year	2,248,925	2,067,871
Actual return on plan assets	336,348	227,201
Employer contribution	162,417	239,830
Fair value of plan assets at end of year	2,148,704	2,248,925
Plan assets (less) greater than benefit obligation	(1,113,592)	(1,851,122)
Interest cost	155,248	166,534
Benefit payments	(570,719)	(257,958)
Administrative expenses	(28,267)	(28,019)
Actuarial (gain) loss	(394,013)	389,763
Projected benefit obligation at end of year	3,262,296	4,100,047
Canadian Plan [Member]
Note 10 - Pension and Other Postretirement Benefits (Details) - Components of Net Periodic Employee Benefit Cost [Line Items]
Projected benefit obligation at beginning of year	1,500,537	1,441,482
Change in plan assets
Fair value of plan assets at beginning of year	1,287,679	1,212,167
Actual return on plan assets	85,068	58,042
Employer contribution	76,523	83,387
Currency translation adjustment	(90,165)	28,202
Fair value of plan assets at end of year	1,267,724	1,287,679
Plan assets (less) greater than benefit obligation	(98,352)	(212,858)
Interest cost	50,692	58,812
Benefit payments	(91,381)	(94,119)
Actuarial (gain) loss	6,992	60,912
Currency translation adjustment	(100,764)	33,450
Projected benefit obligation at end of year	$ 1,366,076	$ 1,500,537