Condensed Consolidated Balance Sheets (Parentheticals) - $ / shares	Mar. 31, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Common stock, no par value (in dollars per share)
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares issued	124,472,468	124,390,217
Common stock, shares outstanding	124,472,468	124,390,217