Consolidated Balance Sheets (Parentheticals) - USD ($) $ / shares in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Allowance for doubtful accounts	$ 27,666	$ 0
Valuation allowance for deferred tax asset	$ 15,017	$ 17,898
Common stock, par value (in dollars per share)	$ 0	$ 0
Common stock, authorized shares	Unlimited	Unlimited
Common stock, issued shares (in shares)	59,708,318	56,197,703
Common stock, outstanding shares (in shares)	59,708,318	56,197,703