Consolidated Balance Sheets (Unaudited) (Parentheticals) - USD ($) $ / shares in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Allowance for doubtful accounts	$ 27,666	$ 27,666
Valuation allowance for deferred tax asset	$ 14,484	$ 15,017
Common stock, no par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized	Unlimited	Unlimited
Common stock, shares issued (in shares)	59,708,318	59,708,318
Common stock, shares outstanding (in shares)	59,708,318	59,708,318